# How to merge two dictionaries# in Python 3.5+:>>>x={'a':1,'b':2}>>>y={'b':3,'c':4}>>>z={**x,**y}>>>z{'c':4,'a':1,'b':3}# In Python 2.x you could use this:>>>z=dict(x,**y)>>>z{'a':1,'c':4,'b':3}

# Why Python Is Great:# Function argument unpackingdefmyfunc(x,y,z):print(x,y,z)tuple_vec=(1,0,1)dict_vec={'x':1,'y':0,'z':1}>>>myfunc(*tuple_vec)1,0,1>>>myfunc(**dict_vec)1,0,1

# The lambda keyword in Python provides a# shortcut for declaring small and# anonymous functions:>>>add=lambdax,y:x+y>>>add(5,3)8# You could declare the same add()# function with the def keyword:>>>defadd(x,y):...returnx+y>>>add(5,3)8# So what's the big fuss about?# Lambdas are *function expressions*:>>>(lambdax,y:x+y)(5,3)8# → Lambda functions are single-expression# functions that are not necessarily bound# to a name (they can be anonymous).# → Lambda functions can't use regular# Python statements and always include an# implicit `return` statement.