推荐网站： Python俱乐部

数据类型：

#整型integer_number = 90 #浮点float_number = 90.4 #复数complex_number = 10 + 10j #list 序列sample_list = [1,2,3,'abc'] #dictionary 字典sample_dic = {
   "key":value, 2:3} #tuple 只读的序列sample_tuple = (1,3,"ab") #嵌套sample_nest = [(1,2,3),{1:2,3:4,'key':[1,2]},3]

 

条件判断结构：

flag1 = some_valueflag2 = other_valueif flag1:  do_function_1()elif flag2:  do_function_2()else:  do_function_3()

循环结构：

for i in range(0, 10):  print(i)for i in ['a','b','c','dd','eee']:  print(i)

Print 函数使用：

#直接出字符串strHello = 'Hello Python' print strHello#输出结果：Hello Python#格式化输出整数strHello = "the length of (%s) is %d" %('Hello World',len('Hello World'))print strHello#输出果：the length of (Hello World) is 11#格式化输出十六进制数nHex = 0x20#%x --- hex 十六进制#%d --- dec 十进制#%d --- oct 八进制print "nHex = %x,nDec = %d,nOct = %o" %(nHex,nHex,nHex)#输出结果：nHex = 20,nDec = 32,nOct = 40#使用整数的各个制打印同一个数#格式化输出浮点数import math#defaultprint "PI = %f" % math.pi#width = 10,precise = 3,align = leftprint "PI = %10.3f" % math.pi#width = 10,precise = 3,align = rigthprint "PI = %-10.3f" % math.pi#前面填充字符print "PI = %06d" % int(math.pi)#输出结果#PI = 3.141593#PI =      3.142#PI = 3.142#PI = 000003#浮点数的格式化，精度、度和#格式化输出字符串#precise = 3print "%.3s " % ("jcodeer")#precise = 4print "%.*s" % (4,"jcodeer")#width = 10,precise = 3print "%10.3s" % ("jcodeer")#输出结果：#jco#jcod#jco#同于字符串也存在精度、度和#格式化输出列表l = [1,2,3,4,'jcodeer']print l#输出结果：[1, 2, 3, 4, 'jcodeer']#于list直接打印即可'''6.出字典(dictionary)'''d = {1:'A',2:'B',3:'C',4:'D'}print d#输出结果：{1: 'A', 2: 'B', 3: 'C', 4: 'D'}#同python也是支持dictionary出的#自动换行#print 会自动在行末加上回车,如果不需回车，只需在print语句的结尾添加一个逗号”,“，就可以改变它的行为。for i in range(0,5):    print i,#万能的%rformatter = "%r %r %r %r" print formatter % (1, 2, 3, 4)print formatter % ("one", "two", "three", "four")print formatter % (True, False, False, True)print formatter % (formatter, formatter, formatter, formatter)print formatter % ("I had this thing.","That you could type up right.", "But it didn't sing.", "So I said goodnight." )#输出结果：$ python ex8.py1 2 3 4'one' 'two' 'three' 'four'True False False True'%r %r %r %r' '%r %r %r %r' '%r %r %r %r' '%r %r %r %r''I had this thing.' 'That you could type up right.' "But it didn't sing." 'So I said goodnight.'$