通过使用Python的os模块,我们可以轻松地判断文件是否存在,并在需要时创建文件。 importosdefcreate_file(file_path):ifnotos.path.exists(file_path):withopen(file_path,'w'):passprint(f"File{file_path}created successfully.")else:print(f"File{file_path}already exists.")file_path="test.txt"create_fi...
我们可以使用os.path.exists()函数来判断文件是否存在,如果不存在则创建文件。 importosdefcreate_file(file_path):# 判断文件是否存在ifnotos.path.exists(file_path):# 创建文件withopen(file_path,'w')asf:passprint(f"文件{file_path}创建成功!")else:print(f"文件{file_path}已存在!")# 调用函数file_...
fname="/User/rokumar/Desktop/sample.csv"withopen(fname,"a")asf:#dohere what you want # it...
os.remove(filename) # 方式2:使用传统的类实现 class TempFileManager: def __init__(self, filename): self.filename = filename def __enter__(self): print(f"创建临时文件: {self.filename}") with open(self.filename, 'w') as f: f.write('一些临时数据') return self.filename def __...
def create_text_file(path): if not os.path.exists(path): print("路径不存在,请输入正确的路径!") return try: with open(path, 'w') as file: file.write("这是一个文本文件的内容。") print("文本文件创建成功!") except FileNotFoundError: ...
'w' open for writing, truncating the file first 'x' create a new file and open it for writing 'a' open for writing, appending to the end of the file if it exists 'b' binary mode 't' text mode (default) '+' open a disk file for updating (reading and writing) ...
"a"- Append - Opens a file for appending, creates the file if it does not exist "w"- Write - Opens a file for writing, creates the file if it does not exist "x"- Create - Creates the specified file, returns an error if the file exists ...
Set next startup patch file if patch_file is not None: try: self._set_startup_patch_file(patch_file) ret = self._check_set_startup_schedule(set_type=SET_PATCH, phase_item="startup-next-patch",retry_times=MAX_TIMES_GET_STARTUP) if ret == ERR: raise Exception("Set startup info ...
# 如果文件存在则报错:FileExistsError: [Errno 17] File exists: 'demo4.txt' f = open('demo41.txt',mode='x',encoding='utf-8') f.write('人生苦短,我用python') f.close() ###===+模式打开文件=== # f = open('demo4.txt','+') #ValueError: Must have exactly one of create/read...
'x' #create a new file and open it for writing,python3新增 'a' #open for writing, appending to the end of the file if it exists 'b' #binary mode 't' #text mode (default),python3新增 '+' #open a disk file for updating (reading and writing) ...