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Python String | join method

schedule Aug 10, 2023
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Python's `str.join(~)` method concatenates the elements of an iterable and returns the resultant string.

Parameters

1. `iterable` | `iterable`

The iterable whose elements are to be concatenated.

Return value

A concatenated string of elements of the iterable.

Examples

Basic usage

To concatenate the elements of iterable `x` using a comma separator:

``` x = ('a', 'b', 'c')separator = ','separator.join(x) 'a,b,c' ```

Note that the elements in tuple `x` are concatenated with separator `','` in between each item.

TypeError

To concatenate the elements of iterable `x` using a comma separator:

``` x = {1, 2, 3}separator = ','print(separator.join(x)) TypeError: sequence item 0: expected str instance, int found ```

A `TypeError` is raised as there are non-string values in the iterable `x`.

Usage with dictionaries

The `join(~)` method will concatenate the keys of a dictionary rather than values:

``` cars = {"Ferrari": "red", "Porsche": "silver", "Bentley": "black"}separator = " > "separator.join(cars) 'Ferrari > Porsche > Bentley' ```
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