![\"python\u5982\u4f55\u751f\u6210\u4e00\u4e2a\u6587\u672c\u6587\u4ef6\"](\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/25090147\/8245bb4d-18bb-4302-955a-2b07c5a3d579.webp\")
<\/p>\n<\/p>\n
Python\u751f\u6210\u4e00\u4e2a\u6587\u672c\u6587\u4ef6\u7684\u65b9\u6cd5\u5305\u62ec\uff1a\u4f7f\u7528open()\u51fd\u6570\u3001\u4f7f\u7528with\u8bed\u53e5\u3001\u5199\u5165\u6570\u636e\u5230\u6587\u4ef6\u3001\u4f7f\u7528\u4e0d\u540c\u6a21\u5f0f\u6253\u5f00\u6587\u4ef6<\/strong>\u3002\u5176\u4e2d\uff0c\u4f7f\u7528open()\u51fd\u6570<\/strong> \u662f\u6700\u57fa\u7840\u7684\u65b9\u6cd5\uff0c\u5b83\u53ef\u4ee5\u8ba9\u4f60\u4ee5\u4e0d\u540c\u6a21\u5f0f\u6253\u5f00\u6587\u4ef6\uff0c\u8fdb\u884c\u8bfb\u5199\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f\u8be6\u7ec6\u8bf4\u660e\uff1a<\/p>\n<\/p>\n \u4f7f\u7528open()\u51fd\u6570\u662fPython\u4e2d\u6700\u57fa\u7840\u4e14\u5e38\u7528\u7684\u65b9\u6cd5\u3002\u901a\u8fc7open()\uff0c\u4f60\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u65b0\u6587\u4ef6\u6216\u8005\u6253\u5f00\u4e00\u4e2a\u5df2\u6709\u7684\u6587\u4ef6\uff0c\u8fdb\u884c\u8bfb\u5199\u64cd\u4f5c\u3002\u51fd\u6570\u7684\u57fa\u672c\u8bed\u6cd5\u4e3a\uff1aopen(filename, mode)\uff0c\u5176\u4e2dfilename\u662f\u6587\u4ef6\u540d\uff0cmode\u662f\u6587\u4ef6\u6253\u5f00\u7684\u6a21\u5f0f\uff0c\u5982"w"\u8868\u793a\u5199\u5165\u6a21\u5f0f\uff0c"r"\u8868\u793a\u8bfb\u53d6\u6a21\u5f0f\uff0c"a"\u8868\u793a\u8ffd\u52a0\u6a21\u5f0f\u7b49\u3002\u4e3e\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n file.write("Hello, World!")<\/p>\n file.close()<\/p>\n <\/code><\/pre>\n<\/p>\n \u8fd9\u79cd\u65b9\u6cd5\u5c3d\u7ba1\u7b80\u5355\uff0c\u4f46\u9700\u8981\u6ce8\u610f\u624b\u52a8\u5173\u95ed\u6587\u4ef6\uff0c\u5426\u5219\u53ef\u80fd\u4f1a\u5bfc\u81f4\u8d44\u6e90\u6cc4\u6f0f\u3002<\/p>\n<\/p>\n \u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u8bb2\u89e3Python\u751f\u6210\u6587\u672c\u6587\u4ef6\u7684\u5404\u79cd\u65b9\u6cd5\u548c\u6280\u5de7\u3002<\/p>\n<\/p>\n \u5728Python\u4e2d\uff0copen()\u51fd\u6570\u662f\u6587\u4ef6\u64cd\u4f5c\u7684\u57fa\u7840\u3002open()\u51fd\u6570\u53ef\u4ee5\u4ee5\u4e0d\u540c\u7684\u6a21\u5f0f\u6253\u5f00\u6587\u4ef6\uff0c\u5305\u62ec\u8bfb\uff08"r"\uff09\u3001\u5199\uff08"w"\uff09\u3001\u8ffd\u52a0\uff08"a"\uff09\u7b49\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u57fa\u672c\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n file.write("Hello, World!")<\/p>\n file.close()<\/p>\n <\/code><\/pre>\n<\/p>\n \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c"example.txt"\u662f\u6587\u4ef6\u540d\uff0c"w"\u8868\u793a\u5199\u6a21\u5f0f\u3002\u5982\u679c\u6587\u4ef6\u4e0d\u5b58\u5728\uff0copen()\u51fd\u6570\u4f1a\u81ea\u52a8\u521b\u5efa\u4e00\u4e2a\u65b0\u6587\u4ef6\uff1b\u5982\u679c\u6587\u4ef6\u5df2\u7ecf\u5b58\u5728\uff0c\u8be5\u6587\u4ef6\u5c06\u88ab\u6e05\u7a7a\u3002<\/p>\n<\/p>\n \u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u4e0d\u540c\u6a21\u5f0f\u7684\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n file = open("example.txt", "w")<\/p>\n file.write("This is a new file.")<\/p>\n file.close()<\/p>\n file = open("example.txt", "r")<\/p>\n content = file.read()<\/p>\n print(content)<\/p>\n file.close()<\/p>\n file = open("example.txt", "a")<\/p>\n file.write("\\nThis is an appended line.")<\/p>\n file.close()<\/p>\n file = open("example.txt", "r+")<\/p>\n file.write("Overwriting content.")<\/p>\n content = file.read()<\/p>\n print(content)<\/p>\n file.close()<\/p>\n <\/code><\/pre>\n<\/p>\n \u4f7f\u7528with\u8bed\u53e5\u662f\u7ba1\u7406\u6587\u4ef6\u64cd\u4f5c\u7684\u63a8\u8350\u65b9\u6cd5\u3002with\u8bed\u53e5\u53ef\u4ee5\u786e\u4fdd\u6587\u4ef6\u5728\u4f7f\u7528\u540e\u81ea\u52a8\u5173\u95ed\uff0c\u4e0d\u9700\u8981\u624b\u52a8\u8c03\u7528close()\u65b9\u6cd5\u3002\u8fd9\u4e0d\u4ec5\u8ba9\u4ee3\u7801\u66f4\u52a0\u7b80\u6d01\uff0c\u8fd8\u80fd\u907f\u514d\u6587\u4ef6\u672a\u6b63\u786e\u5173\u95ed\u5bfc\u81f4\u7684\u8d44\u6e90\u6cc4\u6f0f\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u57fa\u672c\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n file.write("Hello, World!")<\/p>\n <\/code><\/pre>\n<\/p>\n \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cwith\u8bed\u53e5\u4f1a\u81ea\u52a8\u7ba1\u7406\u6587\u4ef6\u7684\u6253\u5f00\u548c\u5173\u95ed\u3002\u5728\u9000\u51fawith\u5757\u65f6\uff0c\u6587\u4ef6\u4f1a\u88ab\u81ea\u52a8\u5173\u95ed\u3002<\/p>\n<\/p>\n \u4f60\u4e5f\u53ef\u4ee5\u4f7f\u7528with\u8bed\u53e5\u540c\u65f6\u7ba1\u7406\u591a\u4e2a\u6587\u4ef6\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u591a\u4e2a\u6587\u4ef6\u7684\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n file1.write("Content for the first file.")<\/p>\n file2.write("Content for the second file.")<\/p>\n <\/code><\/pre>\n<\/p>\n \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u4e24\u4e2a\u6587\u4ef6\u90fd\u4f1a\u5728\u9000\u51fawith\u5757\u65f6\u81ea\u52a8\u5173\u95ed\u3002<\/p>\n<\/p>\n \u6700\u5e38\u89c1\u7684\u6587\u4ef6\u5199\u5165\u64cd\u4f5c\u662f\u5199\u5165\u5b57\u7b26\u4e32\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u57fa\u672c\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n file.write("Hello, World!")<\/p>\n <\/code><\/pre>\n<\/p>\n \u4f60\u4e5f\u53ef\u4ee5\u5c06\u4e00\u4e2a\u5217\u8868\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u5199\u5165\u6587\u4ef6\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5199\u5165\u5217\u8868\u7684\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n with open("example.txt", "w") as file:<\/p>\n for line in lines:<\/p>\n file.write(line + "\\n")<\/p>\n <\/code><\/pre>\n<\/p>\n \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6bcf\u4e2a\u5217\u8868\u5143\u7d20\u90fd\u4f1a\u88ab\u5199\u5165\u6587\u4ef6\uff0c\u5e76\u5728\u672b\u5c3e\u6dfb\u52a0\u4e00\u4e2a\u6362\u884c\u7b26\u3002<\/p>\n<\/p>\n \u5982\u679c\u4f60\u6709\u4e00\u4e2a\u5b57\u5178\u5e76\u4e14\u60f3\u5c06\u5176\u5185\u5bb9\u5199\u5165\u6587\u4ef6\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n<\/p>\n with open("example.txt", "w") as file:<\/p>\n for key, value in data.items():<\/p>\n file.write(f"{key}: {value}\\n")<\/p>\n <\/code><\/pre>\n<\/p>\n \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u5b57\u5178\u7684\u6bcf\u4e2a\u952e\u503c\u5bf9\u90fd\u4f1a\u88ab\u5199\u5165\u6587\u4ef6\uff0c\u5e76\u5728\u672b\u5c3e\u6dfb\u52a0\u4e00\u4e2a\u6362\u884c\u7b26\u3002<\/p>\n<\/p>\n \u8bfb\u6a21\u5f0f\uff08"r"\uff09\u7528\u4e8e\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\u3002\u5982\u679c\u6587\u4ef6\u4e0d\u5b58\u5728\uff0c\u4f1a\u5f15\u53d1FileNotFoundError\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u57fa\u672c\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n content = file.read()<\/p>\n print(content)<\/p>\n <\/code><\/pre>\n<\/p>\n \u5199\u6a21\u5f0f\uff08"w"\uff09\u7528\u4e8e\u5199\u5165\u6587\u4ef6\u5185\u5bb9\u3002\u5982\u679c\u6587\u4ef6\u4e0d\u5b58\u5728\uff0c\u4f1a\u81ea\u52a8\u521b\u5efa\uff1b\u5982\u679c\u6587\u4ef6\u5b58\u5728\uff0c\u4f1a\u6e05\u7a7a\u6587\u4ef6\u5185\u5bb9\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u57fa\u672c\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n file.write("This is a new file.")<\/p>\n <\/code><\/pre>\n<\/p>\n \u8ffd\u52a0\u6a21\u5f0f\uff08"a"\uff09\u7528\u4e8e\u5c06\u65b0\u5185\u5bb9\u8ffd\u52a0\u5230\u6587\u4ef6\u672b\u5c3e\u3002\u5982\u679c\u6587\u4ef6\u4e0d\u5b58\u5728\uff0c\u4f1a\u81ea\u52a8\u521b\u5efa\uff1b\u5982\u679c\u6587\u4ef6\u5b58\u5728\uff0c\u65b0\u7684\u5185\u5bb9\u5c06\u8ffd\u52a0\u5230\u6587\u4ef6\u672b\u5c3e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u57fa\u672c\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n file.write("\\nThis is an appended line.")<\/p>\n <\/code><\/pre>\n<\/p>\n \u8bfb\u5199\u6a21\u5f0f\uff08"r+"\uff09\u7528\u4e8e\u540c\u65f6\u8bfb\u53d6\u548c\u5199\u5165\u6587\u4ef6\u5185\u5bb9\u3002\u5982\u679c\u6587\u4ef6\u4e0d\u5b58\u5728\uff0c\u4f1a\u5f15\u53d1FileNotFoundError\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u57fa\u672c\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n content = file.read()<\/p>\n file.write("\\nAdding new content.")<\/p>\n print(content)<\/p>\n <\/code><\/pre>\n<\/p>\n \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6587\u4ef6\u5185\u5bb9\u4f1a\u88ab\u8bfb\u53d6\u5e76\u6253\u5370\u5230\u63a7\u5236\u53f0\uff0c\u7136\u540e\u65b0\u7684\u5185\u5bb9\u4f1a\u88ab\u8ffd\u52a0\u5230\u6587\u4ef6\u672b\u5c3e\u3002<\/p>\n<\/p>\n \u5f53\u5904\u7406\u5927\u6587\u4ef6\u65f6\uff0c\u4e00\u6b21\u6027\u8bfb\u53d6\u6574\u4e2a\u6587\u4ef6\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5185\u5b58\u4e0d\u8db3\u3002\u4e3a\u4e86\u907f\u514d\u8fd9\u4e2a\u95ee\u9898\uff0c\u53ef\u4ee5\u5206\u5757\u8bfb\u53d6\u6587\u4ef6\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5206\u5757\u8bfb\u53d6\u6587\u4ef6\u7684\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n with open("large_file.txt", "r") as file:<\/p>\n while True:<\/p>\n chunk = file.read(chunk_size)<\/p>\n if not chunk:<\/p>\n break<\/p>\n print(chunk)<\/p>\n <\/code><\/pre>\n<\/p>\n \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6587\u4ef6\u4f1a\u88ab\u5206\u5757\u8bfb\u53d6\uff0c\u6bcf\u6b21\u8bfb\u53d61KB\u7684\u6570\u636e\u3002<\/p>\n<\/p>\n \u5982\u679c\u6587\u4ef6\u6309\u884c\u7ec4\u7ec7\uff0c\u53ef\u4ee5\u4f7f\u7528\u9010\u884c\u8bfb\u53d6\u6765\u5904\u7406\u5927\u6587\u4ef6\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u9010\u884c\u8bfb\u53d6\u6587\u4ef6\u7684\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n for line in file:<\/p>\n print(line, end="")<\/p>\n <\/code><\/pre>\n<\/p>\n \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6587\u4ef6\u4f1a\u88ab\u9010\u884c\u8bfb\u53d6\uff0c\u5e76\u6253\u5370\u5230\u63a7\u5236\u53f0\u3002<\/p>\n<\/p>\n \u5728\u6587\u4ef6\u64cd\u4f5c\u4e2d\uff0c\u53ef\u80fd\u4f1a\u9047\u5230\u5404\u79cd\u5f02\u5e38\uff0c\u5982\u6587\u4ef6\u4e0d\u5b58\u5728\u3001\u8bfb\u5199\u6743\u9650\u4e0d\u8db3\u7b49\u3002\u4e3a\u4e86\u786e\u4fdd\u7a0b\u5e8f\u7684\u7a33\u5b9a\u8fd0\u884c\uff0c\u53ef\u4ee5\u4f7f\u7528try-except\u5757\u6765\u6355\u83b7\u5f02\u5e38\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u6355\u83b7\u5f02\u5e38\u7684\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n with open("non_existent_file.txt", "r") as file:<\/p>\n content = file.read()<\/p>\n print(content)<\/p>\n except FileNotFoundError:<\/p>\n print("File not found. Please check the file path.")<\/p>\n except PermissionError:<\/p>\n print("Permission denied. Please check your access rights.")<\/p>\n except Exception as e:<\/p>\n print(f"An error occurred: {e}")<\/p>\n <\/code><\/pre>\n<\/p>\n \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u4e0d\u540c\u7c7b\u578b\u7684\u5f02\u5e38\u4f1a\u88ab\u5206\u522b\u6355\u83b7\u548c\u5904\u7406\u3002<\/p>\n<\/p>\n \u4f60\u4e5f\u53ef\u4ee5\u5b9a\u4e49\u81ea\u5df1\u7684\u5f02\u5e38\u7c7b\u6765\u5904\u7406\u7279\u5b9a\u7684\u9519\u8bef\u60c5\u51b5\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u81ea\u5b9a\u4e49\u5f02\u5e38\u7684\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n pass<\/p>\n try:<\/p>\n with open("example.txt", "r") as file:<\/p>\n content = file.read()<\/p>\n if "error" in content:<\/p>\nfile = open("example.txt", "w")<\/p>\n\u4e00\u3001\u4f7f\u7528open()\u51fd\u6570\u751f\u6210\u6587\u672c\u6587\u4ef6<\/strong><\/h2>\n
\u57fa\u672c\u7528\u6cd5<\/h2>\n<\/p>\n
file = open("example.txt", "w")<\/p>\n\u4e0d\u540c\u6a21\u5f0f\u4ecb\u7ecd<\/h2>\n<\/p>\n
\n
# \u5199\u5165\u6a21\u5f0f<\/p>\n\u8bfb\u53d6\u6a21\u5f0f<\/strong><\/h2>\n
\u8ffd\u52a0\u6a21\u5f0f<\/strong><\/h2>\n
\u8bfb\u5199\u6a21\u5f0f<\/strong><\/h2>\n
\u4e8c\u3001\u4f7f\u7528with\u8bed\u53e5\u751f\u6210\u6587\u672c\u6587\u4ef6<\/strong><\/h2>\n
\u57fa\u672c\u7528\u6cd5<\/h2>\n<\/p>\n
with open("example.txt", "w") as file:<\/p>\n\u4f7f\u7528\u591a\u4e2a\u6587\u4ef6<\/h2>\n<\/p>\n
with open("example1.txt", "w") as file1, open("example2.txt", "w") as file2:<\/p>\n\u4e09\u3001\u5199\u5165\u6570\u636e\u5230\u6587\u4ef6<\/strong><\/h2>\n
\u5199\u5165\u5b57\u7b26\u4e32<\/h2>\n<\/p>\n
with open("example.txt", "w") as file:<\/p>\n\u5199\u5165\u5217\u8868<\/h2>\n<\/p>\n
lines = ["First line", "Second line", "Third line"]<\/p>\n\u5199\u5165\u5b57\u5178<\/h2>\n<\/p>\n
data = {"name": "Alice", "age": 30, "city": "New York"}<\/p>\n\u56db\u3001\u4f7f\u7528\u4e0d\u540c\u6a21\u5f0f\u6253\u5f00\u6587\u4ef6<\/strong><\/h2>\n
\u8bfb\u6a21\u5f0f<\/h2>\n<\/p>\n
with open("example.txt", "r") as file:<\/p>\n\u5199\u6a21\u5f0f<\/h2>\n<\/p>\n
with open("example.txt", "w") as file:<\/p>\n\u8ffd\u52a0\u6a21\u5f0f<\/h2>\n<\/p>\n
with open("example.txt", "a") as file:<\/p>\n\u8bfb\u5199\u6a21\u5f0f<\/h2>\n<\/p>\n
with open("example.txt", "r+") as file:<\/p>\n\u4e94\u3001\u5904\u7406\u5927\u6587\u4ef6<\/strong><\/h2>\n
\u5206\u5757\u8bfb\u53d6<\/h2>\n<\/p>\n
chunk_size = 1024 # 1KB<\/p>\n\u5206\u884c\u8bfb\u53d6<\/h2>\n<\/p>\n
with open("large_file.txt", "r") as file:<\/p>\n\u516d\u3001\u5904\u7406\u6587\u4ef6\u5f02\u5e38<\/strong><\/h2>\n
\u6355\u83b7\u5f02\u5e38<\/h2>\n<\/p>\n
try:<\/p>\n\u81ea\u5b9a\u4e49\u5f02\u5e38<\/h2>\n<\/p>\n
class CustomFileError(Exception):<\/p>\n