{"id":1026473,"date":"2024-12-31T10:42:59","date_gmt":"2024-12-31T02:42:59","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1026473.html"},"modified":"2024-12-31T10:43:01","modified_gmt":"2024-12-31T02:43:01","slug":"python%e5%a6%82%e4%bd%95%e5%bf%ab%e9%80%9f%e4%be%bf%e5%88%a9txt%e9%87%8c%e7%9a%84%e5%86%85%e5%ae%b9","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1026473.html","title":{"rendered":"python\u5982\u4f55\u5feb\u901f\u4fbf\u5229txt\u91cc\u7684\u5185\u5bb9"},"content":{"rendered":"

\"python\u5982\u4f55\u5feb\u901f\u4fbf\u5229txt\u91cc\u7684\u5185\u5bb9\"<\/p>\n

Python\u4e2d\u5feb\u901f\u904d\u5386TXT\u6587\u4ef6\u5185\u5bb9\u7684\u51e0\u79cd\u65b9\u6cd5\u5305\u62ec\uff1a\u8bfb\u53d6\u6574\u4e2a\u6587\u4ef6\u3001\u9010\u884c\u8bfb\u53d6\u3001\u4f7f\u7528with\u8bed\u53e5\u7ba1\u7406\u6587\u4ef6\u8d44\u6e90\u7b49\u3002<\/strong> \u5176\u4e2d\uff0c\u4f7f\u7528with\u8bed\u53e5\u7ba1\u7406\u6587\u4ef6\u8d44\u6e90\uff0c\u9010\u884c\u8bfb\u53d6<\/strong> \u662f\u4e00\u79cd\u5e38\u89c1\u4e14\u9ad8\u6548\u7684\u65b9\u5f0f\u3002\u4e0b\u9762\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528Python\u5feb\u901f\u4fbf\u5229txt\u6587\u4ef6\u5185\u5bb9\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528with\u8bed\u53e5\u7ba1\u7406\u6587\u4ef6\u8d44\u6e90<\/h3>\n<\/p>\n

\u4f7f\u7528with<\/code>\u8bed\u53e5\u6253\u5f00\u6587\u4ef6\uff0c\u53ef\u4ee5\u786e\u4fdd\u5728\u64cd\u4f5c\u5b8c\u6587\u4ef6\u540e\u81ea\u52a8\u5173\u95ed\u6587\u4ef6\uff0c\u907f\u514d\u8d44\u6e90\u6cc4\u6f0f\u7684\u95ee\u9898\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<\/p>\n

with open('example.txt', 'r') as file:<\/p>\n
    for line in file:<\/p>\n
        print(line.strip())<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u4e2a\u65b9\u6cd5\u7684\u4f18\u70b9\u5728\u4e8e\u4ee3\u7801\u7b80\u6d01\uff0c\u540c\u65f6\u81ea\u52a8\u7ba1\u7406\u6587\u4ef6\u7684\u6253\u5f00\u548c\u5173\u95ed\u3002line.strip()<\/code>\u65b9\u6cd5\u7528\u4e8e\u53bb\u9664\u6bcf\u884c\u672b\u5c3e\u7684\u6362\u884c\u7b26\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u8bfb\u53d6\u6574\u4e2a\u6587\u4ef6\u5185\u5bb9<\/h3>\n<\/p>\n
\u5982\u679c\u6587\u4ef6\u8f83\u5c0f\uff0c\u53ef\u4ee5\u4e00\u6b21\u6027\u8bfb\u53d6\u6574\u4e2a\u6587\u4ef6\u5185\u5bb9\uff0c\u7136\u540e\u8fdb\u884c\u904d\u5386\u3002\u4ee5\u4e0b\u662f\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<\/p>\n
with open('example.txt', 'r') as file:<\/p>\n
    contents = file.read()<\/p>\n
    for line in contents.split('\\n'):<\/p>\n
        print(line)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u9002\u7528\u4e8e\u6587\u4ef6\u5185\u5bb9\u8f83\u5c0f\u7684\u60c5\u51b5\uff0c\u56e0\u4e3a\u5b83\u5c06\u6574\u4e2a\u6587\u4ef6\u5185\u5bb9\u8bfb\u5165\u5185\u5b58\uff0c\u5982\u679c\u6587\u4ef6\u592a\u5927\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5185\u5b58\u4e0d\u8db3\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528\u8fed\u4ee3\u5668\u9010\u884c\u8bfb\u53d6<\/h3>\n<\/p>\n
\u4f7f\u7528\u6587\u4ef6\u5bf9\u8c61\u672c\u8eab\u4f5c\u4e3a\u8fed\u4ee3\u5668\u9010\u884c\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\uff0c\u8fd9\u662f\u6700\u76f4\u63a5\u7684\u65b9\u5f0f\u3002\u4ee5\u4e0b\u662f\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<\/p>\n
with open('example.txt', 'r') as file:<\/p>\n
    for line in file:<\/p>\n
        print(line.strip())<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u4e0e\u7b2c\u4e00\u79cd\u65b9\u6cd5\u7c7b\u4f3c\uff0c\u4f46\u66f4\u76f4\u63a5\u3002Python\u7684\u6587\u4ef6\u5bf9\u8c61\u672c\u8eab\u5c31\u662f\u4e00\u4e2a\u8fed\u4ee3\u5668\uff0c\u56e0\u6b64\u53ef\u4ee5\u76f4\u63a5\u7528\u4e8efor\u5faa\u73af\u3002<\/p>\n<\/p>\n
\u56db\u3001\u4f7f\u7528readlines()\u65b9\u6cd5<\/h3>\n<\/p>\n
readlines()<\/code>\u65b9\u6cd5\u4e00\u6b21\u6027\u8bfb\u53d6\u6587\u4ef6\u4e2d\u7684\u6240\u6709\u884c\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u5217\u8868\u3002\u4ee5\u4e0b\u662f\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<\/p>\n
with open('example.txt', 'r') as file:<\/p>\n
    lines = file.readlines()<\/p>\n
    for line in lines:<\/p>\n
        print(line.strip())<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u4e5f\u9002\u7528\u4e8e\u6587\u4ef6\u8f83\u5c0f\u7684\u60c5\u51b5\uff0c\u56e0\u4e3a\u5b83\u5c06\u6240\u6709\u884c\u8bfb\u5165\u5185\u5b58\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u9010\u5757\u8bfb\u53d6\u5927\u6587\u4ef6<\/h3>\n<\/p>\n
\u5bf9\u4e8e\u975e\u5e38\u5927\u7684\u6587\u4ef6\uff0c\u53ef\u4ee5\u9010\u5757\u8bfb\u53d6\u6765\u907f\u514d\u5185\u5b58\u95ee\u9898\u3002\u4ee5\u4e0b\u662f\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<\/p>\n
def read_in_chunks(file_object, chunk_size=1024):<\/p>\n
    while True:<\/p>\n
        data = file_object.read(chunk_size)<\/p>\n
        if not data:<\/p>\n
            break<\/p>\n
        yield data<\/p>\n
with open('example.txt', 'r') as file:<\/p>\n
    for chunk in read_in_chunks(file):<\/p>\n
        print(chunk)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u9002\u7528\u4e8e\u5904\u7406\u975e\u5e38\u5927\u7684\u6587\u4ef6\uff0c\u901a\u8fc7\u4e00\u6b21\u8bfb\u53d6\u4e00\u5757\u6570\u636e\uff0c\u51cf\u5c11\u5185\u5b58\u5360\u7528\u3002<\/p>\n<\/p>\n
\u516d\u3001\u4f7f\u7528pandas\u5e93\u8bfb\u53d6\u6587\u4ef6<\/h3>\n<\/p>\n
\u5bf9\u4e8e\u7ed3\u6784\u5316\u7684txt\u6587\u4ef6\uff0c\u53ef\u4ee5\u4f7f\u7528pandas\u5e93\u6765\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\u3002\u4ee5\u4e0b\u662f\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<\/p>\n
import pandas as pd<\/p>\n
df = pd.read_csv('example.txt', delimiter='\\t')<\/p>\n
print(df.head())<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u9002\u7528\u4e8e\u9700\u8981\u8fdb\u884c\u6570\u636e\u5206\u6790\u7684\u60c5\u51b5\uff0cpandas\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u6570\u636e\u5904\u7406\u529f\u80fd\u3002<\/p>\n<\/p>\n
\u4e03\u3001\u591a\u7ebf\u7a0b\u5904\u7406\u5927\u6587\u4ef6<\/h3>\n<\/p>\n
\u5728\u5904\u7406\u8d85\u5927\u6587\u4ef6\u65f6\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u591a\u7ebf\u7a0b\u6765\u63d0\u9ad8\u8bfb\u53d6\u6548\u7387\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
import threading<\/p>\n
def read_file_chunk(file_path, start, size):<\/p>\n
    with open(file_path, 'r') as file:<\/p>\n
        file.seek(start)<\/p>\n
        data = file.read(size)<\/p>\n
        print(data)<\/p>\n
file_path = 'example.txt'<\/p>\n
chunk_size = 1024<\/p>\n
threads = []<\/p>\n
with open(file_path, 'r') as file:<\/p>\n
    file.seek(0, 2)<\/p>\n
    file_size = file.tell()<\/p>\n
for i in range(0, file_size, chunk_size):<\/p>\n
    thread = threading.Thread(target=read_file_chunk, args=(file_path, i, chunk_size))<\/p>\n
    threads.append(thread)<\/p>\n
    thread.start()<\/p>\n
for thread in threads:<\/p>\n
    thread.join()<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u901a\u8fc7\u591a\u7ebf\u7a0b\u5e76\u53d1\u8bfb\u53d6\u6587\u4ef6\uff0c\u63d0\u9ad8\u4e86\u8bfb\u53d6\u6548\u7387\uff0c\u9002\u7528\u4e8e\u8d85\u5927\u6587\u4ef6\u7684\u5904\u7406\u3002<\/p>\n<\/p>\n
\u516b\u3001\u4f7f\u7528\u5185\u5b58\u6620\u5c04\u6587\u4ef6\uff08mmap\uff09<\/h3>\n<\/p>\n
\u5185\u5b58\u6620\u5c04\u6587\u4ef6\uff08mmap\uff09\u5141\u8bb8\u5c06\u6587\u4ef6\u7684\u4e00\u90e8\u5206\u6620\u5c04\u5230\u5185\u5b58\u4e2d\uff0c\u65b9\u4fbf\u5feb\u901f\u8bbf\u95ee\u3002\u4ee5\u4e0b\u662f\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<\/p>\n
import mmap<\/p>\n
with open('example.txt', 'r') as file:<\/p>\n
    with mmap.mmap(file.fileno(), length=0, access=mmap.ACCESS_READ) as mm:<\/p>\n
        for line in iter(mm.readline, b""):<\/p>\n
            print(line.decode('utf-8').strip())<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u9002\u7528\u4e8e\u9700\u8981\u9ad8\u6548\u8bfb\u53d6\u5927\u6587\u4ef6\u7684\u60c5\u51b5\uff0c\u901a\u8fc7\u5c06\u6587\u4ef6\u6620\u5c04\u5230\u5185\u5b58\u4e2d\uff0c\u63d0\u4f9b\u5feb\u901f\u8bbf\u95ee\u3002<\/p>\n<\/p>\n
\u4e5d\u3001\u603b\u7ed3<\/h3>\n<\/p>\n
\u901a\u8fc7\u4ee5\u4e0a\u51e0\u79cd\u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u5728Python\u4e2d\u5feb\u901f\u4fbf\u5229txt\u6587\u4ef6\u5185\u5bb9\u3002\u4f7f\u7528with\u8bed\u53e5\u7ba1\u7406\u6587\u4ef6\u8d44\u6e90\u3001\u9010\u884c\u8bfb\u53d6<\/strong>\u662f\u6700\u5e38\u89c1\u4e14\u9ad8\u6548\u7684\u65b9\u6cd5\uff0c\u9002\u7528\u4e8e\u5927\u591a\u6570\u60c5\u51b5\u3002\u5bf9\u4e8e\u8d85\u5927\u6587\u4ef6\uff0c\u53ef\u4ee5\u8003\u8651\u9010\u5757\u8bfb\u53d6\u3001\u591a\u7ebf\u7a0b\u5904\u7406\u3001\u5185\u5b58\u6620\u5c04\u6587\u4ef6<\/strong>\u7b49\u65b9\u6cd5\u6765\u63d0\u9ad8\u6548\u7387\u3002\u6839\u636e\u5177\u4f53\u7684\u6587\u4ef6\u5927\u5c0f\u548c\u5e94\u7528\u573a\u666f\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\uff0c\u80fd\u591f\u6709\u6548\u63d0\u5347\u6587\u4ef6\u5904\u7406\u7684\u6548\u7387\u548c\u6027\u80fd\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5982\u4f55\u4f7f\u7528Python\u8bfb\u53d6txt\u6587\u4ef6\u7684\u5185\u5bb9\uff1f<\/strong>
\u4f7f\u7528Python\u8bfb\u53d6txt\u6587\u4ef6\u975e\u5e38\u7b80\u5355\uff0c\u53ef\u4ee5\u5229\u7528\u5185\u7f6e\u7684open()<\/code>\u51fd\u6570\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u57fa\u672c\u793a\u4f8b\uff1a  <\/p>\n
with open('\u6587\u4ef6\u540d.txt', 'r', encoding='utf-8') as file:\n    content = file.read()\n    print(content)\n<\/code><\/pre>\n
\u8fd9\u79cd\u65b9\u6cd5\u4f1a\u6253\u5f00\u4e00\u4e2a\u6587\u4ef6\u5e76\u8bfb\u53d6\u5176\u6240\u6709\u5185\u5bb9\uff0c\u786e\u4fdd\u4f7f\u7528with<\/code>\u8bed\u53e5\u53ef\u4ee5\u81ea\u52a8\u7ba1\u7406\u6587\u4ef6\u7684\u6253\u5f00\u548c\u5173\u95ed\u3002<\/p>\n
Python\u4e2d\u5982\u4f55\u5bf9txt\u6587\u4ef6\u7684\u5185\u5bb9\u8fdb\u884c\u5904\u7406\u6216\u5206\u6790\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u5904\u7406txt\u6587\u4ef6\u7684\u5185\u5bb9\u53ef\u4ee5\u901a\u8fc7\u5b57\u7b26\u4e32\u64cd\u4f5c\u3001\u6b63\u5219\u8868\u8fbe\u5f0f\u6216\u4f7f\u7528\u5e93\u5982pandas<\/code>\u6765\u5b9e\u73b0\u3002\u4f8b\u5982\uff0c\u5982\u679c\u9700\u8981\u5206\u6790\u6587\u672c\u4e2d\u7684\u5355\u8bcd\u9891\u7387\uff0c\u53ef\u4ee5\u5148\u8bfb\u53d6\u5185\u5bb9\uff0c\u7136\u540e\u4f7f\u7528\u5b57\u7b26\u4e32\u7684split()<\/code>\u65b9\u6cd5\u5c06\u6587\u672c\u5206\u5272\u6210\u5355\u8bcd\uff0c\u5e76\u5229\u7528\u5b57\u5178\u6765\u7edf\u8ba1\u6bcf\u4e2a\u5355\u8bcd\u7684\u51fa\u73b0\u6b21\u6570\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a  <\/p>\n
from collections import Counter\n\nwith open('\u6587\u4ef6\u540d.txt', 'r', encoding='utf-8') as file:\n    content = file.read()\n    words = content.split()\n    word_count = Counter(words)\n    print(word_count)\n<\/code><\/pre>\n
\u8fd9\u79cd\u65b9\u5f0f\u53ef\u4ee5\u5e2e\u52a9\u7528\u6237\u5feb\u901f\u83b7\u53d6\u6587\u672c\u4e2d\u7684\u4fe1\u606f\u3002<\/p>\n
\u5982\u4f55\u5c06\u5904\u7406\u540e\u7684\u6570\u636e\u4fdd\u5b58\u56detxt\u6587\u4ef6\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u5c06\u5904\u7406\u540e\u7684\u6570\u636e\u5199\u56de\u5230txt\u6587\u4ef6\u4e5f\u975e\u5e38\u7b80\u5355\u3002\u53ef\u4ee5\u4f7f\u7528open()<\/code>\u51fd\u6570\u4ee5\u5199\u5165\u6a21\u5f0f\u6253\u5f00\u6587\u4ef6\uff0c\u5e76\u4f7f\u7528write()<\/code>\u65b9\u6cd5\u5c06\u5185\u5bb9\u4fdd\u5b58\u3002\u793a\u4f8b\u5982\u4e0b\uff1a  <\/p>\n
with open('\u8f93\u51fa\u6587\u4ef6.txt', 'w', encoding='utf-8') as file:\n    file.write('\u5904\u7406\u540e\u7684\u5185\u5bb9')\n<\/code><\/pre>\n
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