Im looking to replace the first "/" in a string and the following works. Python3
>>> u'/test/test.json'.replace('/', '', 1)
'test/test.json'
However I do sometimes come across the following strings, where a "/" character exists but not as the first character. I only ever want to remove that character if it appears as the first character and only the first occurrence also.
>>> u'test/test.json'.replace('/', '', 1)
'testtest.json'
So test/test.json should remain test/test.json
There is an lstrip method just for that:
str.lstrip([chars])
Return a copy of the string with leading characters removed. The chars argument is a string specifying the set of characters to be removed.
'/test/test.json'.lstrip('/')
Ouput:
'test/test.json'
"//test/test.json"? Only the first / occurrence should be removed'test/test.json', how would that be a problem?
Here is a possible solution (s is your string):
s = s[1:] if s[0] == '/' else s
For example:
s = 'test/test.json'
print(s[1:] if s[0] == '/' else s) # 'test/test.json'
s = '/test/test.json'
print(s[1:] if s[0] == '/' else s) # 'test/test.json'
You can create a simple function, which takes a string and when the first character of it is a string, it will remove it and return a proper value. If there will be no slash at the beginning, it will return a given string.
def replace_slash(string):
if string[0] == '/':
return string[1:]
else:
return string
You can remove the first desired character by writing a condition for that
path = u'/test/test.json'
path = path[1:] if (path[0]=='/') else path
print(path)
Thank you
