Is there a 'foreach' function in Python 3?

Question

Every occurence of "foreach" I've seen (PHP, C#, ...) does basically the same as pythons "for" statement.

These are more or less equivalent:

// PHP:
foreach ($array as $val) {
    print($val);
}

// C#
foreach (String val in array) {
    console.writeline(val);
}

// Python
for val in array:
    print(val)

So, yes, there is a "foreach" in python. It's called "for".

What you're describing is an "array map" function. This could be done with list comprehensions in python:

names = ['tom', 'john', 'simon']

namesCapitalized = [capitalize(n) for n in names]

Python doesn't have a foreach statement per se. It has for loops built into the language.

for element in iterable:
    operate(element)

If you really wanted to, you could define your own foreach function:

def foreach(function, iterable):
    for element in iterable:
        function(element)

As a side note the for element in iterable syntax comes from the ABC programming language, one of Python's influences.

Other examples:

Python Foreach Loop:

array = ['a', 'b']
for value in array:
    print(value)
    # a
    # b

Python For Loop:

array = ['a', 'b']
for index in range(len(array)):
    print("index: %s | value: %s" % (index, array[index]))
    # index: 0 | value: a
    # index: 1 | value: b

map can be used for the situation mentioned in the question.

E.g.

map(len, ['abcd','abc', 'a']) # 4 3 1

For functions that take multiple arguments, more arguments can be given to map:

map(pow, [2, 3], [4,2]) # 16 9

It returns a list in python 2.x and an iterator in python 3

In case your function takes multiple arguments and the arguments are already in the form of tuples (or any iterable since python 2.6) you can use itertools.starmap. (which has a very similar syntax to what you were looking for). It returns an iterator.

E.g.

for num in starmap(pow, [(2,3), (3,2)]):
    print(num)

gives us 8 and 9

Yes, although it uses the same syntax as a for loop.

for x in ['a', 'b']: print(x)

Here is the example of the "foreach" construction with simultaneous access to the element indexes in Python:

for idx, val in enumerate([3, 4, 5]):
    print (idx, val)