Python 요약#1

python 요약#1

Variable and Data Types

• 특징: High-level, Interpreted, Object-oriented
• i = 123
• f = 12.3
• b = True
• case-sensitive

Whitespace and Statements

• statement 구분은 whitespace로

Comment

• # single comment
• “”” multi
  line
  comment
  “””

Math Operations

• +, -, *, /, %, **(exponentiation)

Strings

• “string”
• ‘string’
• “string with \’escape\’”
• “string”[0] == s

string methods

• len(“string”)
• str(23)
• “string”.upper()
• “STRING”.lower()

Print

• print “string”
• print “your name is %s. and age is %s” %(“Ted”, str(39))
• print "%d to the power of %d is %d." % (base, exponent, result)

Date and Time

• from datetime import datetime
  now = datetime.now()
  now.month,  now.day, now.year, now.hour, now.minute, now.second

Control Flows

Comparators

• ==, !=, >=, <=, >, <

Boolean Operator

• and, or, not

if, Else and Elif

• if 8 > 9:
  print ‘..’
  elif 9 > 8:
  print ‘xxxx’
  else:
  print ‘test’

string and char

• <string>[<start index>:<end index(not included)>
  s = “foobar”
  s[0:2]  # fo

functions

• def tax(bill):
     """Adds 8% tax to a restaurant bill."""
     bill *= 1.08
     print bill
     return bill
• def favorite_fruits(*args):
      print "좋아하는 과일은:" , args
  
  favorite_fruits("사과", “배", “수박", “바나나")

importing module

• 모듈 import하기
  import math
  print math.sqrt(25)
• 모듈내 특정함수만 import
  from <모듈명> import <함수명>
• ex)  from math import sqrt
• 모들내 모든함수 import
  from <모듈명> import *