python exists
时间: 2023-10-26 10:50:46 浏览: 38
Yes, Python is a popular high-level programming language that is widely used for web development, scientific computing, data analysis, artificial intelligence, and many other applications. It was first released in 1991 and has since become one of the most widely used programming languages in the world.
相关问题
python not exists
在Python中,判断某个文件或目录是否存在可以使用os模块的exists函数。该函数接受一个路径作为参数,如果路径所指定的文件或目录存在,则返回True,否则返回False。根据引用的代码片段,可以看出exists被用于判断变量exists是否为0。因此,python not exists可以理解为判断变量exists是否为0的逻辑表达式。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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exists python
exists函数是Python中的一个内置函数,它用于判断指定的文件或目录是否存在。在Python的os模块中,可以使用os.path.exists()函数来判断文件或目录是否存在。如果存在,则返回True,否则返回False。下面是一个使用exists函数的示例代码:
```python
import os
test_path = './test'
if os.path.exists(test_path):
if os.path.isdir(test_path):
print(test_path, 'is dir')
elif os.path.isfile(test_path):
print(test_path, 'is file')
else:
os.mkdir(test_path)
```
这段代码首先判断路径`test_path`是否存在,如果存在,则进一步判断它是一个目录还是一个文件。如果是目录,则输出`test_path is dir`;如果是文件,则输出`test_path is file`。如果路径不存在,则创建一个名为`test`的目录。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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