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python string replace index

# strings are immutable in Python, 
# we have to create a new string which 
# includes the value at the desired index

s = s[:index] + newstring + s[index + 1:]

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replace character in string python by index

## returns a matching string where every even letter is uppercase,
## and every odd letter is lowercase
def string_slicing(str_1):
    length = len(str_1)
    for x in range(0, length):
        if x % 2 != 0:
            str_1 = str_1[:x] + str_1[x].upper() + str_1[x+1:]
        else:
            str_1 = str_1[:x] + str_1[x].lower() + str_1[x+1:]
    return str_1

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python string replace index

replace character in string python by index

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