python2
1.print
print 'hello world!'
print 'hello', 'world'
print 'hello' + 'world'
print 'hello %s' % ('world')
print 'hello %r' % ('world')
print '%d + %d = ' % (1 , 3)
print '''hello
... world and hello
... everyone'''
2.數(shù)學(xué)運(yùn)算
print 1 + 1
+、-映九、梦湘、/、%
3.變量
a = 'hello'
print a
4.提示用戶并獲取用戶輸入
a = raw_input('install, Y or N?')
print a
5.文件操作
print open('a.txt').read()
f = open('a.txt', 'a') # 以追加方式寫入文件
f.write(' and everyone')
f = open('a.txt')
print f.read()
f.close()
6.函數(shù)
def add(a, b):#def標(biāo)識符表示聲明一個函數(shù)
print a + b # 前面要有縮進(jìn)
add(1, 3) # 調(diào)用函數(shù)
