def f(**kwargs):
for key, value in kwargs.items():
print("%s == %s" %(key, value))
f(a = 'python', b = 'php', c = 'java')
print()
f(lang1 = 'python', lang2 = 'php', lang3 = 'java', lang4 = 'c', lang5 = 'c++')
'''
run:
a == python
b == php
c == java
lang1 == python
lang2 == php
lang3 == java
lang4 == c
lang5 == c++
'''