python replace first occurrence in string
# string replace() function perfectly solves this problem: # string.replace(s, old, new[, maxreplace]) # Return a copy of string s with all occurrences of substring old replaced # by new. If the optional argument maxreplace is given, the first maxreplace # occurrences are replaced. >>> u'longlongTESTstringTEST'.replace('TEST', '?', 1) u'longlong?stringTEST'
python find second occurrence in string
# find index of second occurence of substring in string idx = string.find(substring, string.find(substring) + 1)
python find first occurrence in list
#iterate through list for item in yourlist: #if item is equal to a value if item == 'value': #store the item in a variable yourvar = item #break out of loop break
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