在Python中,可以使用try-except语句来捕捉文件不存在的异常,并处理该异常,从而避免程序报错并继续运行。 例如,下面是一个读取文件的示例代码: try: with open('example.txt', 'r') as f: data = f.read() print(data) except FileNotFoundError: print('The file does not exist.') 在上面的代码中,使用...
except FileNotFoundError: print('The file does not exist.') else: print(contents) 1. 2. 3. 4. 5. 6. 7. 8. 因为当前执行文件目录下没有a.txt文件,所以会执行FileNotFoundError的异常处理,在控制台打印出The file does not exist.文本信息。else代码块放的是try代码块成功执行后需要继续执行的语句。
file_path="non_existent_file.txt"ifos.path.exists(file_path):withopen(file_path,"r")asfile:content=file.read()else:print(f"Warning:{file_path}does not exist. Creating a new file.")withopen(file_path,"w")asfile:file.write("This is a new file.") 1. 2. 3. 4. 5. 6. 7. 8...
什么叫zip不存在,什么叫Requirement 'pygame\...\..win_amd64.whl' looks like a filename,but the file does not exist.原来就有好不好,怎么会说不存在呢,真是绞尽脑汁,也不知道这都是啥跟啥啊,在解决了整整三天
content = file.read()print(content)else:print(f"File{file_path}does not exist.") 2.PermissionError PermissionError通常在你没有足够的权限来访问、读取、写入或删除文件时发生。这可能是因为文件权限设置不正确,或者你的用户账户没有足够的权限。
if not os.path.isfile(file_path_real): logging.error("File does not exist.") return None, None try: tree = etree.parse(file_path_real) # Obtain the root node. root = tree.getroot() except Exception as reason: logging.error(reason) raise for lic in root: for child in lic: if ...
print(f"File {file_path} does not exist.") 4. 报错处理 如果你遇到特定错误,如XLRDError: Excel xlsx file; not supported,这表明你可能错误地使用了xlrd尝试打开.xlsx文件,请确认你的文件扩展名是.xls。 5. 权限问题 如果程序没有读取文件的权限,你可能会遇到权限错误,确保文件不是只读的,或者你的用户账...
from pathlib import Path path_to_file = 'readme.txt' path = Path(path_to_file) if path.is_file(): print(f'The file {path_to_file} exists') else: print(f'The file {path_to_file} does not exist') 如果存在 readme.txt 文件, 将会打印以下输出: The file readme.txt exists 总结...
python读取文件出错误(FileNotFoundError: [Errno 2] File b'ch06/ex1.csv' does not exist: b'ch06/ex1.csv)(UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb4 in position 8: invalid start byte) importpandas aspddf=pd.read_csv('ch06/ex1.csv') ...
3.2 处理FileNotFoundError异常 defcount_words(filename):'''计算一个文件大致包含多少个单词'''try: with open(filename) as f1: contents=f1.read()exceptFileNotFoundError: msg="Sorry, the file"+ filename +"does not exist."print(msg)else:#计算文件大致包含多少个单词words =contents.split() ...