How to get file extension

How to get the file extension?

First analyze the problem:

#The file extension form is separated by "." after the file path, so we can use Python's string interception Select to get the file extension.

 def get_file_extension(filename):   
 arr = os.path.splitext(filename)
    return arr[len(arr) - 1]
    #return arr[len(arr) - 1].replace(".","") 可以将结果中的.去掉
 
 
print(get_file_extension("abc.jpg"))
#返回 .jpg
 
print(get_file_extension("2014.01.25.gif"))
#返回 .gif

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