Python基础学习代码之序列

str1 = 'abced'
for i in range(-1, -len(str1), -1) + [None]:
 print str1[:i]

s, t = 'abc', 'def'
print zip(s, t)

for i, t in enumerate(str1):
 print i, t

print isinstance('foo', str)
import string

def checkid():
 alphas = string.letters + '_'
 nums = string.digits
 check = raw_input('input id for check:')
 if len(check) > 1:
 if check[0] not in alphas:
 print "invaid id"
 else:
 for o in check[1:]:
 if o not in alphas + nums:
 print "invaid id"
 break
 else:
 print("valid id")

def func1():
 alist = ["xx3", "1tc"]
 for i, s in enumerate(alist):
 print i, s

def func2():
 alist = ["hello", "come", "12"]
 blist = ["welcome", "what", 15]
 for i, s in zip(alist,blist):
 print i, s

def func3():
 alist = []
 anum = raw_input('input>>').strip()
 for i in anum:
 alist.append(i)
 alist.sort()
 alist.reverse()
 return alist

def func4():
 alist = []
 while True:

 num = int(raw_input('input >>').strip())
 if num == 0:
 break
 alist.append(num)
 alist.sort()
 return alist

import keyword

def func5():
 alphas = string.letters
 nums = string.digits
 print 'the id check!'
 str1 = raw_input('input id:')
 if str1 in keyword.kwlist:
 print 'invalid,it is a keyword!'
 else:
 if str1[0] not in alphas + '_':
 print 'invalid,first symbol must be alpha or underline!'
 else:
 for c in str1[1:]:
 if c not in alphas + nums:
 print 'invalid,symbol must be alpha or numbers!'

 print 'valid id!'

def showstr():
 strs = raw_input('input strings::')
 if len(strs) == 0:
 return False
 elif len(strs) == 1:
 print strs
 return True
 for i, j in enumerate(strs):
 if i == 0 and len(strs) != 1:
 print j, strs[i+1]
 elif i != 0 and i == (len(strs) - 1):
 print strs[i-1]
 else:
 print strs[i-1], j, strs[i+1]
 return True

def cmpstr():
 str1 = raw_input('input string1>')
 str2 = raw_input('input string2>')
 if len(str1) != len(str2):
 return False
 for i, j in enumerate(str1):
 if ord(j) - ord(str2[i]) != 0:
 return False
 return True

def func6():
 str1 = raw_input('input your strings:>>')
 i = 0
 j = len(str1) - 1
 while str1[i] == ' ':
 i = i + 1
 while str1[j] == ' ':
 j = j - 1
 str1 = str1[i:j+1]
 print str1

def func7():
 alist = ["zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"]
 nlist = ''
 while True:
 number = raw_input('input a number(0~1000):')
 if len(number) == 0:
 break
 else:
 number = str(number)
 for i in number:
 nlist += alist[int(i)] + '-'
 return nlist[0:-1]

def func8():
 minutes = int(raw_input('input minutes:'))
 minu = minutes % 60
 hour = minutes / 60
 print "%d:%d" % (hour, minu)

def func9():
 str1 = raw_input('input string:>>')
 return str1.swapcase()

def func10():
 mystr = raw_input('enter a number:')
 number = int(mystr)
 alist = range(1, number+1)
 print 'before:','alist'
 i = 0
 while i < len(alist):
 if number % alist[i] == 0:
 del alist[i]
 i = i + 1
 print 'after',alist

def findchr(str1, char):
 lchar = len(char)
 if char not in str1:
 return -1
 for i, j in enumerate(str1):
 if j in char:
 if str1[i:i+lchar] == char:
 return i
 return -1

def rfindchr(str1, char):
 lchar = len(char)
 lstring = len(str1)
 if char not in str1:
 return -1
 for i, j in enumerate(str1):
 if j in char:
 if str1[lstring-1-i:lstring-1-i+lchar] == char:
 return i
 return -1

def subchr(string1, origchar, newchar):
 import string
 return string.replace(string1, origchar, newchar)

def atoc(strparm):
 cindex = strparm.rfind('-')
 if cindex <= 0:
 cindex = strparm.rfind('+')
 if cindex > 0:
 real = float(strparm[0:cindex])
 compl = float(strparm[cindex:-1])
 return complex(real, compl)

import random

def func11():
 alist = ["paper", "shears", "stone"]
 g = int(raw_input('input 1:paper,2:shears,3:stone:>')) - 1
 print "your come %s" % alist[g]
 r = random.choice([0, 1, 2])
 print "him come %s" % alist[r]
 if g == r:
 print 'nobody win!'
 # r win
 if (r > g and g - r != -2) or r - g == -2:
 print 'him win!'
 # g win
 else:
 print 'i win!'

import datetime

def isleapyear(year):
 if (year % 4 == 0) and (year % 100 != 0) or (year % 4 == 0) and (year % 100 == 0):
 return True
 else:
 return False

def func12():
 month = {1:31,2:28,3:31,4:30,5:31,6:30,7:31,8:31,9:30,10:31,11:30,12:31}
 while True:
 sdate = raw_input('input start date[dd/mm/yyyy]:').split('/')
 dd, mm, yyyy = 0, 1, 2
 sdate[dd],sdate[mm],sdate[yyyy] =int(sdate[0]),int(sdate[1]),int(sdate[2])
 if sdate[mm] > 12 or sdate[mm] < 1:
 continue
 if isleapyear(sdate[yyyy]):
 month[2] = 29
 if sdate[dd] < 1 or sdate[dd] > month[sdate[mm]]:
 continue
 break
 while True:
 edate = raw_input('input end date[dd/mm/yyyy]:').split('/')
 edate[dd],edate[mm],edate[yyyy] =int(edate[0]),int(edate[1]),int(edate[2])
 if edate[mm] > 12 or edate[mm] < 1:
 continue
 if isleapyear(sdate[yyyy]):
 month[2] = 29
 if edate[dd] < 1 or edate[dd] > month[edate[mm]]:
 continue
 break