、Python
a,b,c='good','bad','ok'
log.write('diege,test
')
print print 'the shell is python!'
if/elif/else if "python" in text:
print text
for/else for x in mylist:
print x
while/else while X > Y:
print 'hello'
pass while Ture:
pass
break,continue while True:
if not line: break
try/except/finally try:
action()
except:
print 'action error'
raise raise endSearch,location
import,from import sys
from sys import stdin
def,return,yield def f(a,b,c=1,*d):
return a+b+c+d[0]
def gen(n):
for i in n,yield i*2
class class subclass(Superclass)
staticData=[]
global def function():
global x,y
x='new'
del del data[k] del data[i:j] del obj:attr del variable del
exec exec "import sys"
exec cod in gdict,ldict
assert assert X > Y
with/as (2.6) with open('data') as myfile
process(myfile)
、
1、
()
；
{}
2、 ？
，
tabn 。
， 。
3、
1） ;
>>> x=2
>>> y=1
>>> if x>y:print x
;
>>> a=1;b=2;print a+b
2）
{},[],()
>>> mylist=[
... [1,2,3],
... [4,5,6],
... [7,8,9]]
>>> a,b,c=1,2,3
>>> d=(a+
... b
... +c)
>>> d
6
3、
while True:
reply=raw_input('Enter text:')
if reply == 'stop':break
print reply.upper()
4、
raw_input ，
while True:
reply=raw_input("Enter text:")
if reply=='stop':break
print int(reply) ** 2
5、
,
while True:
reply=raw_input("Enter text:")
if reply=='stop':
break
elif not reply.isdigit():
print "Bad!"*8
else:
print int(reply) ** 2
print "Bye!"
bad
6、 try
try ， 。
while True:
reply=raw_input("Enter text:")
if reply=='stop':break
try:
num=int(reply)
except:
print "Bad!"*8
else:
print int(reply) ** 2
print "Bye!"
try （ ）， except ， 。 else ， try
， else 。
Python try ， except （ ），
else （ )