{"id":1060051,"date":"2024-12-31T15:30:35","date_gmt":"2024-12-31T07:30:35","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1060051.html"},"modified":"2024-12-31T15:30:41","modified_gmt":"2024-12-31T07:30:41","slug":"%e5%a6%82%e4%bd%95%e6%8a%8a%e5%ad%97%e7%ac%a6%e4%b8%b2%e5%a4%8d%e5%88%b6%e5%8f%98%e9%87%8fpython","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1060051.html","title":{"rendered":"\u5982\u4f55\u628a\u5b57\u7b26\u4e32\u590d\u5236\u53d8\u91cfpython"},"content":{"rendered":"

\"\u5982\u4f55\u628a\u5b57\u7b26\u4e32\u590d\u5236\u53d8\u91cfpython\"<\/p>\n

\u8981\u5c06\u5b57\u7b26\u4e32\u590d\u5236\u5230Python\u4e2d\u7684\u53d8\u91cf\uff0c\u53ef\u4ee5\u4f7f\u7528\u8d4b\u503c\u8fd0\u7b97\u7b26\uff08=\uff09\u6765\u5b9e\u73b0\u3002<\/strong> \u4f8b\u5982\uff0c\u5982\u679c\u4f60\u6709\u4e00\u4e2a\u5b57\u7b26\u4e32\u5e76\u4e14\u60f3\u5c06\u5176\u590d\u5236\u5230\u4e00\u4e2a\u53d8\u91cf\u4e2d\uff0c\u53ef\u4ee5\u50cf\u4e0b\u9762\u8fd9\u6837\u505a\uff1a<\/p>\n<\/p>\n

original_string = "Hello, World!"<\/p>\n
copied_string = original_string<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0coriginal_string<\/code> \u7684\u503c\u88ab\u590d\u5236\u5230 copied_string<\/code> \u4e2d\u3002\u73b0\u5728 copied_string<\/code> \u4e2d\u5305\u542b\u4e86\u4e0e original_string<\/code> \u76f8\u540c\u7684\u5b57\u7b26\u4e32\u5185\u5bb9\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539\u5176\u4e2d\u7684\u4e00\u4e2a\u53d8\u91cf\u6765\u9a8c\u8bc1\u5b83\u4eec\u662f\u5426\u72ec\u7acb\u3002<\/p>\n<\/p>\n
\n
\u4e00\u3001\u5b57\u7b26\u4e32\u8d4b\u503c\u7684\u57fa\u672c\u64cd\u4f5c<\/h3>\n<\/p>\n
\u5728Python\u4e2d\uff0c\u5b57\u7b26\u4e32\u662f\u4e00\u79cd\u4e0d\u53ef\u53d8\u7684\u6570\u636e\u7c7b\u578b\uff0c\u8fd9\u610f\u5473\u7740\u5b57\u7b26\u4e32\u4e00\u65e6\u521b\u5efa\uff0c\u5c31\u65e0\u6cd5\u88ab\u4fee\u6539\u3002\u6b63\u56e0\u4e3a\u5982\u6b64\uff0c\u5b57\u7b26\u4e32\u8d4b\u503c\u5728\u5b9e\u9645\u4f7f\u7528\u4e2d\u975e\u5e38\u7b80\u5355\uff0c\u53ea\u9700\u8981\u4f7f\u7528\u8d4b\u503c\u8fd0\u7b97\u7b26\u5373\u53ef\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u57fa\u672c\u64cd\u4f5c\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
original_string = "Python is awesome!"<\/p>\n
new_string = original_string<\/p>\n
print(new_string)  # \u8f93\u51fa: Python is awesome!<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cnew_string<\/code> \u88ab\u8d4b\u503c\u4e3a original_string<\/code> \u7684\u503c\u3002\u7531\u4e8e\u5b57\u7b26\u4e32\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u56e0\u6b64 new_string<\/code> \u548c original_string<\/code> \u90fd\u6307\u5411\u76f8\u540c\u7684\u5b57\u7b26\u4e32\u5bf9\u8c61\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u5b57\u7b26\u4e32\u7684\u6df1\u62f7\u8d1d\u4e0e\u6d45\u62f7\u8d1d<\/h3>\n<\/p>\n
\u5728Python\u4e2d\uff0c\u5b57\u7b26\u4e32\u7684\u8d4b\u503c\u64cd\u4f5c\u5b9e\u9645\u4e0a\u662f\u6d45\u62f7\u8d1d\uff0c\u56e0\u4e3a\u5b57\u7b26\u4e32\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u6240\u4ee5\u6d45\u62f7\u8d1d\u548c\u6df1\u62f7\u8d1d\u6ca1\u6709\u4ec0\u4e48\u533a\u522b\u3002\u7136\u800c\uff0c\u4e3a\u4e86\u7406\u89e3\u6df1\u6d45\u62f7\u8d1d\u7684\u6982\u5ff5\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5217\u8868\u6765\u89e3\u91ca\u3002<\/p>\n<\/p>\n
import copy<\/p>\n
original_list = ["a", "b", "c"]<\/p>\n
shallow_copy = original_list<\/p>\n
deep_copy = copy.deepcopy(original_list)<\/p>\n
original_list[0] = "z"<\/p>\n
print(original_list)  # \u8f93\u51fa: ['z', 'b', 'c']<\/p>\n
print(shallow_copy)  # \u8f93\u51fa: ['z', 'b', 'c']<\/p>\n
print(deep_copy)  # \u8f93\u51fa: ['a', 'b', 'c']<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cshallow_copy<\/code> \u548c original_list<\/code> \u6307\u5411\u540c\u4e00\u4e2a\u5bf9\u8c61\uff0c\u56e0\u6b64\u4fee\u6539 original_list<\/code> \u4e5f\u4f1a\u5f71\u54cd shallow_copy<\/code>\u3002\u4f46 deep_copy<\/code> \u662f original_list<\/code> \u7684\u6df1\u62f7\u8d1d\uff0c\u4fee\u6539 original_list<\/code> \u4e0d\u4f1a\u5f71\u54cd deep_copy<\/code>\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u5b57\u7b26\u4e32\u64cd\u4f5c\u7684\u5b9e\u9645\u5e94\u7528<\/h3>\n<\/p>\n
\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u9700\u8981\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u5404\u79cd\u64cd\u4f5c\uff0c\u5982\u62fc\u63a5\u3001\u5206\u5272\u3001\u66ff\u6362\u7b49\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u89c1\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
1. \u5b57\u7b26\u4e32\u62fc\u63a5<\/h4>\n<\/p>\n
\u5b57\u7b26\u4e32\u62fc\u63a5\u53ef\u4ee5\u4f7f\u7528 +<\/code> \u8fd0\u7b97\u7b26\u6216 join<\/code> \u65b9\u6cd5\uff1a<\/p>\n<\/p>\n
str1 = "Hello"<\/p>\n
str2 = "World"<\/p>\n
combined_str = str1 + ", " + str2 + "!"<\/p>\n
print(combined_str)  # \u8f93\u51fa: Hello, World!<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u6216\u8005\u4f7f\u7528 join<\/code> \u65b9\u6cd5\uff1a<\/p>\n<\/p>\n
words = ["Hello", "World"]<\/p>\n
combined_str = ", ".join(words) + "!"<\/p>\n
print(combined_str)  # \u8f93\u51fa: Hello, World!<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u5b57\u7b26\u4e32\u5206\u5272<\/h4>\n<\/p>\n
\u5b57\u7b26\u4e32\u5206\u5272\u53ef\u4ee5\u4f7f\u7528 split<\/code> \u65b9\u6cd5\uff1a<\/p>\n<\/p>\n
sentence = "Python is awesome"<\/p>\n
words = sentence.split()<\/p>\n
print(words)  # \u8f93\u51fa: ['Python', 'is', 'awesome']<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4f60\u8fd8\u53ef\u4ee5\u6307\u5b9a\u5206\u9694\u7b26\uff1a<\/p>\n<\/p>\n
sentence = "Python,is,awesome"<\/p>\n
words = sentence.split(",")<\/p>\n
print(words)  # \u8f93\u51fa: ['Python', 'is', 'awesome']<\/p>\n
<\/code><\/pre>\n<\/p>\n
3. \u5b57\u7b26\u4e32\u66ff\u6362<\/h4>\n<\/p>\n
\u5b57\u7b26\u4e32\u66ff\u6362\u53ef\u4ee5\u4f7f\u7528 replace<\/code> \u65b9\u6cd5\uff1a<\/p>\n<\/p>\n
sentence = "Python is awesome"<\/p>\n
new_sentence = sentence.replace("awesome", "fantastic")<\/p>\n
print(new_sentence)  # \u8f93\u51fa: Python is fantastic<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u56db\u3001\u5b57\u7b26\u4e32\u683c\u5f0f\u5316<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u662f\u5c06\u53d8\u91cf\u7684\u503c\u63d2\u5165\u5230\u5b57\u7b26\u4e32\u4e2d\u7684\u4e00\u79cd\u65b9\u6cd5\u3002Python \u63d0\u4f9b\u4e86\u591a\u79cd\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u7684\u65b9\u6cd5\uff1a<\/p>\n<\/p>\n
1. \u4f7f\u7528 %<\/code> \u8fd0\u7b97\u7b26<\/h4>\n<\/p>\n
name = "John"<\/p>\n
age = 25<\/p>\n
formatted_str = "Name: %s, Age: %d" % (name, age)<\/p>\n
print(formatted_str)  # \u8f93\u51fa: Name: John, Age: 25<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u4f7f\u7528 format<\/code> \u65b9\u6cd5<\/h4>\n<\/p>\n
formatted_str = "Name: {}, Age: {}".format(name, age)<\/p>\n
print(formatted_str)  # \u8f93\u51fa: Name: John, Age: 25<\/p>\n
<\/code><\/pre>\n<\/p>\n
3. \u4f7f\u7528 f-string (Python 3.6+)<\/h4>\n<\/p>\n
formatted_str = f"Name: {name}, Age: {age}"<\/p>\n
print(formatted_str)  # \u8f93\u51fa: Name: John, Age: 25<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e94\u3001\u5b57\u7b26\u4e32\u7684\u7f16\u7801\u4e0e\u89e3\u7801<\/h3>\n<\/p>\n
\u5728\u5904\u7406\u5b57\u7b26\u4e32\u65f6\uff0c\u6709\u65f6\u9700\u8981\u8fdb\u884c\u7f16\u7801\u548c\u89e3\u7801\u64cd\u4f5c\uff0c\u7279\u522b\u662f\u5728\u5904\u7406\u6587\u4ef6\u8f93\u5165\u8f93\u51fa\u6216\u7f51\u7edc\u901a\u4fe1\u65f6\u3002Python \u63d0\u4f9b\u4e86\u65b9\u4fbf\u7684\u7f16\u7801\u548c\u89e3\u7801\u65b9\u6cd5\uff1a<\/p>\n<\/p>\n
1. \u7f16\u7801<\/h4>\n<\/p>\n
\u5c06\u5b57\u7b26\u4e32\u7f16\u7801\u4e3a\u5b57\u8282\u5e8f\u5217\uff1a<\/p>\n<\/p>\n
original_string = "Hello, World!"<\/p>\n
encoded_string = original_string.encode("utf-8")<\/p>\n
print(encoded_string)  # \u8f93\u51fa: b'Hello, World!'<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u89e3\u7801<\/h4>\n<\/p>\n
\u5c06\u5b57\u8282\u5e8f\u5217\u89e3\u7801\u4e3a\u5b57\u7b26\u4e32\uff1a<\/p>\n<\/p>\n
decoded_string = encoded_string.decode("utf-8")<\/p>\n
print(decoded_string)  # \u8f93\u51fa: Hello, World!<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u516d\u3001\u5b57\u7b26\u4e32\u7684\u5e38\u7528\u65b9\u6cd5<\/h3>\n<\/p>\n
Python \u63d0\u4f9b\u4e86\u8bb8\u591a\u5185\u7f6e\u7684\u5b57\u7b26\u4e32\u65b9\u6cd5\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u65b9\u6cd5\uff1a<\/p>\n<\/p>\n
1. upper<\/code> \u548c lower<\/code><\/h4>\n<\/p>\n
\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5168\u5927\u5199\u6216\u5168\u5c0f\u5199\uff1a<\/p>\n<\/p>\n
original_string = "Hello, World!"<\/p>\n
upper_string = original_string.upper()<\/p>\n
lower_string = original_string.lower()<\/p>\n
print(upper_string)  # \u8f93\u51fa: HELLO, WORLD!<\/p>\n
print(lower_string)  # \u8f93\u51fa: hello, world!<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. strip<\/code><\/h4>\n<\/p>\n
\u79fb\u9664\u5b57\u7b26\u4e32\u4e24\u7aef\u7684\u7a7a\u767d\u5b57\u7b26\uff1a<\/p>\n<\/p>\n
original_string = "  Hello, World!  "<\/p>\n
stripped_string = original_string.strip()<\/p>\n
print(stripped_string)  # \u8f93\u51fa: Hello, World!<\/p>\n
<\/code><\/pre>\n<\/p>\n
3. startswith<\/code> \u548c endswith<\/code><\/h4>\n<\/p>\n
\u68c0\u67e5\u5b57\u7b26\u4e32\u662f\u5426\u4ee5\u7279\u5b9a\u5b50\u5b57\u7b26\u4e32\u5f00\u5934\u6216\u7ed3\u5c3e\uff1a<\/p>\n<\/p>\n
original_string = "Hello, World!"<\/p>\n
starts_with_hello = original_string.startswith("Hello")<\/p>\n
ends_with_world = original_string.endswith("World!")<\/p>\n
print(starts_with_hello)  # \u8f93\u51fa: True<\/p>\n
print(ends_with_world)  # \u8f93\u51fa: True<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e03\u3001\u5b57\u7b26\u4e32\u7684\u6b63\u5219\u8868\u8fbe\u5f0f<\/h3>\n<\/p>\n
\u6b63\u5219\u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u5f3a\u5927\u7684\u5b57\u7b26\u4e32\u5339\u914d\u5de5\u5177\uff0cPython \u63d0\u4f9b\u4e86 re<\/code> \u6a21\u5757\u6765\u652f\u6301\u6b63\u5219\u8868\u8fbe\u5f0f\u64cd\u4f5c\uff1a<\/p>\n<\/p>\n
1. \u5339\u914d<\/h4>\n<\/p>\n
\u4f7f\u7528 match<\/code> \u65b9\u6cd5\u5339\u914d\u5b57\u7b26\u4e32\uff1a<\/p>\n<\/p>\n
import re<\/p>\n
pattern = r"Hello"<\/p>\n
string = "Hello, World!"<\/p>\n
match = re.match(pattern, string)<\/p>\n
if match:<\/p>\n
    print("Match found!")  # \u8f93\u51fa: Match found!<\/p>\n
else:<\/p>\n
    print("No match found.")<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u641c\u7d22<\/h4>\n<\/p>\n
\u4f7f\u7528 search<\/code> \u65b9\u6cd5\u641c\u7d22\u5b57\u7b26\u4e32\u4e2d\u7684\u6a21\u5f0f\uff1a<\/p>\n<\/p>\n
pattern = r"World"<\/p>\n
search = re.search(pattern, string)<\/p>\n
if search:<\/p>\n
    print("Search found!")  # \u8f93\u51fa: Search found!<\/p>\n
else:<\/p>\n
    print("No search found.")<\/p>\n
<\/code><\/pre>\n<\/p>\n
3. \u66ff\u6362<\/h4>\n<\/p>\n
\u4f7f\u7528 sub<\/code> \u65b9\u6cd5\u66ff\u6362\u5b57\u7b26\u4e32\u4e2d\u7684\u6a21\u5f0f\uff1a<\/p>\n<\/p>\n
pattern = r"World"<\/p>\n
replacement = "Universe"<\/p>\n
new_string = re.sub(pattern, replacement, string)<\/p>\n
print(new_string)  # \u8f93\u51fa: Hello, Universe!<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u516b\u3001\u5b57\u7b26\u4e32\u7684\u591a\u884c\u64cd\u4f5c<\/h3>\n<\/p>\n
\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e09\u91cd\u5f15\u53f7\uff08'''<\/code> \u6216 """<\/code>\uff09\u6765\u521b\u5efa\u591a\u884c\u5b57\u7b26\u4e32\uff1a<\/p>\n<\/p>\n
multi_line_string = """This is a<\/p>\n
multi-line<\/p>\n
string."""<\/p>\n
print(multi_line_string)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u5728\u5904\u7406\u957f\u5b57\u7b26\u4e32\u6216\u5305\u542b\u6362\u884c\u7b26\u7684\u5b57\u7b26\u4e32\u65f6\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n
\u4e5d\u3001\u5b57\u7b26\u4e32\u7684\u5206\u5272\u4e0e\u8fde\u63a5<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u7684\u5206\u5272\u4e0e\u8fde\u63a5\u662f\u5904\u7406\u6587\u672c\u6570\u636e\u65f6\u5e38\u7528\u7684\u64cd\u4f5c\uff1a<\/p>\n<\/p>\n
1. \u5206\u5272<\/h4>\n<\/p>\n
\u4f7f\u7528 split<\/code> \u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u5206\u5272\u4e3a\u5217\u8868\uff1a<\/p>\n<\/p>\n
sentence = "Python is awesome"<\/p>\n
words = sentence.split()<\/p>\n
print(words)  # \u8f93\u51fa: ['Python', 'is', 'awesome']<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u8fde\u63a5<\/h4>\n<\/p>\n
\u4f7f\u7528 join<\/code> \u65b9\u6cd5\u5c06\u5217\u8868\u8fde\u63a5\u4e3a\u5b57\u7b26\u4e32\uff1a<\/p>\n<\/p>\n
words = ["Python", "is", "awesome"]<\/p>\n
sentence = " ".join(words)<\/p>\n
print(sentence)  # \u8f93\u51fa: Python is awesome<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5341\u3001\u5b57\u7b26\u4e32\u7684\u67e5\u627e\u4e0e\u8ba1\u6570<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u7684\u67e5\u627e\u4e0e\u8ba1\u6570\u64cd\u4f5c\u5728\u6587\u672c\u5206\u6790\u4e2d\u975e\u5e38\u6709\u7528\uff1a<\/p>\n<\/p>\n
1. \u67e5\u627e<\/h4>\n<\/p>\n
\u4f7f\u7528 find<\/code> \u65b9\u6cd5\u67e5\u627e\u5b50\u5b57\u7b26\u4e32\u7684\u4f4d\u7f6e\uff1a<\/p>\n<\/p>\n
sentence = "Python is awesome"<\/p>\n
position = sentence.find("awesome")<\/p>\n
print(position)  # \u8f93\u51fa: 10<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u8ba1\u6570<\/h4>\n<\/p>\n
\u4f7f\u7528 count<\/code> \u65b9\u6cd5\u7edf\u8ba1\u5b50\u5b57\u7b26\u4e32\u51fa\u73b0\u7684\u6b21\u6570\uff1a<\/p>\n<\/p>\n
sentence = "Python is awesome. Python is great."<\/p>\n
count = sentence.count("Python")<\/p>\n
print(count)  # \u8f93\u51fa: 2<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5341\u4e00\u3001\u5b57\u7b26\u4e32\u7684\u9a8c\u8bc1<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u7684\u9a8c\u8bc1\u64cd\u4f5c\u7528\u4e8e\u68c0\u67e5\u5b57\u7b26\u4e32\u662f\u5426\u6ee1\u8db3\u67d0\u4e9b\u6761\u4ef6\uff1a<\/p>\n<\/p>\n
1. \u662f\u5426\u5168\u4e3a\u5b57\u6bcd<\/h4>\n<\/p>\n
\u4f7f\u7528 isalpha<\/code> \u65b9\u6cd5\u68c0\u67e5\u5b57\u7b26\u4e32\u662f\u5426\u5168\u4e3a\u5b57\u6bcd\uff1a<\/p>\n<\/p>\n
string = "Python"<\/p>\n
is_alpha = string.isalpha()<\/p>\n
print(is_alpha)  # \u8f93\u51fa: True<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u662f\u5426\u5168\u4e3a\u6570\u5b57<\/h4>\n<\/p>\n
\u4f7f\u7528 isdigit<\/code> \u65b9\u6cd5\u68c0\u67e5\u5b57\u7b26\u4e32\u662f\u5426\u5168\u4e3a\u6570\u5b57\uff1a<\/p>\n<\/p>\n
string = "12345"<\/p>\n
is_digit = string.isdigit()<\/p>\n
print(is_digit)  # \u8f93\u51fa: True<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5341\u4e8c\u3001\u5b57\u7b26\u4e32\u7684\u5927\u5c0f\u5199\u8f6c\u6362<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u7684\u5927\u5c0f\u5199\u8f6c\u6362\u5728\u6587\u672c\u5904\u7406\u548c\u683c\u5f0f\u5316\u65f6\u975e\u5e38\u5e38\u89c1\uff1a<\/p>\n<\/p>\n
1. \u5927\u5199\u8f6c\u5c0f\u5199<\/h4>\n<\/p>\n
\u4f7f\u7528 lower<\/code> \u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5c0f\u5199\uff1a<\/p>\n<\/p>\n
string = "HELLO, WORLD!"<\/p>\n
lower_string = string.lower()<\/p>\n
print(lower_string)  # \u8f93\u51fa: hello, world!<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u5c0f\u5199\u8f6c\u5927\u5199<\/h4>\n<\/p>\n
\u4f7f\u7528 upper<\/code> \u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5927\u5199\uff1a<\/p>\n<\/p>\n
string = "hello, world!"<\/p>\n
upper_string = string.upper()<\/p>\n
print(upper_string)  # \u8f93\u51fa: HELLO, WORLD!<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5341\u4e09\u3001\u5b57\u7b26\u4e32\u7684\u5b57\u7b26\u66ff\u6362<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u7684\u5b57\u7b26\u66ff\u6362\u7528\u4e8e\u4fee\u6539\u5b57\u7b26\u4e32\u4e2d\u7684\u7279\u5b9a\u5b57\u7b26\uff1a<\/p>\n<\/p>\n
1. \u4f7f\u7528 replace<\/code> \u65b9\u6cd5<\/h4>\n<\/p>\n
string = "Hello, World!"<\/p>\n
new_string = string.replace("World", "Python")<\/p>\n
print(new_string)  # \u8f93\u51fa: Hello, Python!<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u8fdb\u884c\u590d\u6742\u66ff\u6362<\/h4>\n<\/p>\n
import re<\/p>\n
string = "Hello, World!"<\/p>\n
pattern = r"World"<\/p>\n
replacement = "Python"<\/p>\n
new_string = re.sub(pattern, replacement, string)<\/p>\n
print(new_string)  # \u8f93\u51fa: Hello, Python!<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5341\u56db\u3001\u5b57\u7b26\u4e32\u7684\u5207\u7247\u64cd\u4f5c<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u7684\u5207\u7247\u64cd\u4f5c\u7528\u4e8e\u63d0\u53d6\u5b57\u7b26\u4e32\u7684\u5b50\u5b57\u7b26\u4e32\uff1a<\/p>\n<\/p>\n
1. \u57fa\u672c\u5207\u7247<\/h4>\n<\/p>\n
string = "Hello, World!"<\/p>\n
substring = string[7:12]<\/p>\n
print(substring)  # \u8f93\u51fa: World<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u6b65\u957f\u5207\u7247<\/h4>\n<\/p>\n
string = "Hello, World!"<\/p>\n
substring = string[0:12:2]<\/p>\n
print(substring)  # \u8f93\u51fa: Hlo ol<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5341\u4e94\u3001\u5b57\u7b26\u4e32\u7684\u53cd\u8f6c<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u7684\u53cd\u8f6c\u64cd\u4f5c\u5728\u67d0\u4e9b\u7b97\u6cd5\u4e2d\u975e\u5e38\u6709\u7528\uff1a<\/p>\n<\/p>\n
1. \u4f7f\u7528\u5207\u7247\u64cd\u4f5c\u53cd\u8f6c\u5b57\u7b26\u4e32<\/h4>\n<\/p>\n
string = "Hello, World!"<\/p>\n
reversed_string = string[::-1]<\/p>\n
print(reversed_string)  # \u8f93\u51fa: !dlroW ,olleH<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5341\u516d\u3001\u5b57\u7b26\u4e32\u7684\u6bd4\u8f83<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u7684\u6bd4\u8f83\u7528\u4e8e\u68c0\u67e5\u4e24\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u76f8\u7b49\u6216\u6bd4\u8f83\u5b83\u4eec\u7684\u5b57\u5178\u5e8f\uff1a<\/p>\n<\/p>\n
1. \u4f7f\u7528 ==<\/code> \u8fd0\u7b97\u7b26\u6bd4\u8f83\u5b57\u7b26\u4e32<\/h4>\n<\/p>\n
string1 = "Python"<\/p>\n
string2 = "Python"<\/p>\n
is_equal = string1 == string2<\/p>\n
print(is_equal)  # \u8f93\u51fa: True<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u4f7f\u7528 ><\/code> \u548c <<\/code> \u8fd0\u7b97\u7b26\u6bd4\u8f83\u5b57\u7b26\u4e32\u7684\u5b57\u5178\u5e8f<\/h4>\n<\/p>\n
string1 = "Python"<\/p>\n
string2 = "Java"<\/p>\n
is_greater = string1 > string2<\/p>\n
print(is_greater)  # \u8f93\u51fa: True<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u901a\u8fc7\u4ee5\u4e0a\u8be6\u7ec6\u7684\u5185\u5bb9\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230Python\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c\u65b9\u6cd5\uff0c\u4f7f\u5f97\u5b57\u7b26\u4e32\u5904\u7406\u53d8\u5f97\u975e\u5e38\u65b9\u4fbf\u548c\u9ad8\u6548\u3002\u638c\u63e1\u8fd9\u4e9b\u65b9\u6cd5\u53ef\u4ee5\u6781\u5927\u5730\u63d0\u9ad8\u7f16\u7801\u6548\u7387\u548c\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5982\u4f55\u5728Python\u4e2d\u521b\u5efa\u5b57\u7b26\u4e32\u7684\u526f\u672c\uff1f<\/strong><\/p>\n
\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u7b80\u5355\u7684\u8d4b\u503c\u8bed\u53e5\u5c06\u5b57\u7b26\u4e32\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u53d8\u91cf\u4e2d\u3002\u4f8b\u5982\uff0c\u4f7f\u7528new_string = original_string<\/code>\u8bed\u53e5\u4f1a\u5c06original_string<\/code>\u7684\u5185\u5bb9\u590d\u5236\u5230new_string<\/code>\u4e2d\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5b57\u7b26\u4e32\u5728Python\u4e2d\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u56e0\u6b64\u5bf9new_string<\/code>\u7684\u4efb\u4f55\u66f4\u6539\u4e0d\u4f1a\u5f71\u54cdoriginal_string<\/code>\u3002<\/p>\n
\u662f\u5426\u53ef\u4ee5\u4f7f\u7528\u5207\u7247\u6216\u5176\u4ed6\u65b9\u6cd5\u6765\u590d\u5236\u5b57\u7b26\u4e32\uff1f<\/strong><\/p>\n
\u5f53\u7136\u53ef\u4ee5\uff01\u5207\u7247\u662f\u4e00\u4e2a\u5e38\u7528\u7684\u65b9\u6cd5\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528new_string = original_string[:]<\/code>\u6765\u521b\u5efa\u5b57\u7b26\u4e32\u7684\u526f\u672c\u3002\u6b64\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528str()<\/code>\u51fd\u6570\uff0c\u4f8b\u5982new_string = str(original_string)<\/code>\uff0c\u8fd9\u4e24\u79cd\u65b9\u6cd5\u90fd\u80fd\u6709\u6548\u5730\u590d\u5236\u5b57\u7b26\u4e32\u3002<\/p>\n
\u5728\u590d\u5236\u5b57\u7b26\u4e32\u65f6\u662f\u5426\u4f1a\u5f71\u54cd\u5185\u5b58\u4f7f\u7528\uff1f<\/strong><\/p>\n
\u5728Python\u4e2d\uff0c\u5b57\u7b26\u4e32\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u56e0\u6b64\u590d\u5236\u5b57\u7b26\u4e32\u4f1a\u5728\u5185\u5b58\u4e2d\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u5bf9\u8c61\u3002\u867d\u7136Python\u4f1a\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u4f18\u5316\u5185\u5b58\u4f7f\u7528\uff08\u4f8b\u5982\uff0c\u4e24\u4e2a\u53d8\u91cf\u53ef\u80fd\u6307\u5411\u540c\u4e00\u4e2a\u5b57\u7b26\u4e32\u5bf9\u8c61\uff09\uff0c\u4e00\u822c\u6765\u8bf4\uff0c\u521b\u5efa\u526f\u672c\u4f1a\u6d88\u8017\u989d\u5916\u7684\u5185\u5b58\u3002\u4e3a\u4e86\u66f4\u597d\u5730\u7ba1\u7406\u5185\u5b58\uff0c\u5c3d\u91cf\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u5b57\u7b26\u4e32\u590d\u5236\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u8981\u5c06\u5b57\u7b26\u4e32\u590d\u5236\u5230Python\u4e2d\u7684\u53d8\u91cf\uff0c\u53ef\u4ee5\u4f7f\u7528\u8d4b\u503c\u8fd0\u7b97\u7b26\uff08=\uff09\u6765\u5b9e\u73b0\u3002 \u4f8b\u5982\uff0c\u5982\u679c\u4f60\u6709\u4e00\u4e2a\u5b57\u7b26\u4e32\u5e76\u4e14\u60f3\u5c06\u5176\u590d\u5236 […]","protected":false},"author":3,"featured_media":1060066,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1060051"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=1060051"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1060051\/revisions"}],"predecessor-version":[{"id":1060067,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1060051\/revisions\/1060067"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1060066"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1060051"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1060051"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1060051"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}