How to replace string from a index instead of beginning?-CodePudding

Python has a string.replace() to replace a certain text with another piece of text in a string

I'm wondering whether there is something like string.replace_index() which can replace the substring from a specific index and does not start from the beginning.

For example:

string = "test test test test"

print string.replace('test', 'world', 1) # "world test test test"

#this is the goal
print string.replace_index('test', 'world', 10) # "test test world test"

CodePudding user response：

There is no built-in way to do this. But you can achieve that this way:

s = "test test test test"
print(s[:5]   s[:-5].replace('test', 'world', 1))

Output:

test world test test

CodePudding user response：

Hey this function lets you replace from an index like so

def replace_index(string, index, old_str, new_str, count):
    return string[:index]   string[index:].replace(old_str, new_str, count)

For Example:

string = "test test test test"

replace_index(string, 10, "test", "world", 1) # "test test world test"