Python学习（二）：入门篇：python中流程控制与函数编写

>>> False==True
False
>>> False==False
True
>>> not False
True
>>> False and False
False
>>> False and True
False
>>> False or True
True

pwd=input(‘please input the password:   ‘)
if pwd==‘admin‘:
    print ‘success!‘
else:
    print ‘error!‘
    

score=int(input(‘please input the score: ‘))
if score>=90:
    print ‘A‘
elif 80<=score<90:
    print ‘B‘
elif 60<=score<70:
    print ‘C‘
else:
     print ‘D‘

pets=[‘dog‘,‘cat‘,‘pig‘]
for i in range(len(pets)):
    print pets[i]

>>> 
dog
cat
pig

>>> while i<10:
	print i
	i=i+1    #Python中没有 ++  --
	
2
3
4
5
6
7
8
9

total=0
while True:
    if total<100:
        total=total+2
    else:
        total=total-2
        break
print total
    

import math
def area(r)：
‘‘‘ return the area of a cicle
‘‘‘

return math.pi*r**2

 >>>print(area.__doc__)
 return the area of a circle

def greet(name,greeting=‘hello‘):
      ....

import myfile
dir(myfile)