python-basic | Development notes

Basic operations in Python

loops

• for - common map iterator

res = 0
for x in '1 2 3':
  res += x
print "Sum is {}".format(res)

• for - inline

  syntax: val = [thing for thing in list_of_things]

  matrix = [1, 2, 3]
  print "ELements of matrix * 2 is: {}".format([x * 2 for x in matrix])
  

• for - range elements

for x in range(0, 3): print x

input/output

• read an string stream, parse to int and print

Ex. input: '0 3 1'

a0, a1, a2 = raw_input().strip().split(' ')
a0, a1, a2 = [int(a0), int(a1), int(a2)]
print a0, a1, a2