#如何通过索引访问元组里的元素
a=word[2]
print ("a is: "+a)
b=word[1:3]
print ("b is: ")
print (b) # index 1 and 2 elements of word.
c=word[:2]
print ("c is: ")
print (c) # index 0 and 1 elements of word.
d=word[0:]
print ("d is: ")
print (d) # All elements of word.
#元组可以合并
e=word[:2]+word[2:]
print ("e is: ")
print (e) # All elements of word.
f=word[-1]
print ("f is: ")
print (f) # The last elements of word.
g=word[-4:-2]
print ("g is: ")
print (g) # index 3 and 4 elements of word.
h=word[-2:]
print ("h is: ")
print (h) # The last two elements.
i=word[:-2]
print ("i is: ")
print (i) # Everything except the last two characters
l=len(word)
print ("Length of word is: "+ str(l))
print ("Adds new element")
word.append('h')
print (word)
#删除元素
del word[0]
print (word)
del word[1:3]
print (word)
word="abcdefg"
a=word[2]
print ("a is: "+a)
b=word[1:3]
print ("b is: "+b) # index 1 and 2 elements of word.
c=word[:2]
print ("c is: "+c) # index 0 and 1 elements of word.
d=word[0:]
print ("d is: "+d) # All elements of word.
e=word[:2]+word[2:]
print ("e is: "+e) # All elements of word.
f=word[-1]
print ("f is: "+f) # The last elements of word.
g=word[-4:-2]
print ("g is: "+g) # index 3 and 4 elements of word.
h=word[-2:]
print ("h is: "+h) # The last two elements.
i=word[:-2]
print ("i is: "+i) # Everything except the last two characters
l=len(word)
print ("Length of word is: "+ str(l))
spath="D:/download/baa.txt"
f=open(spath,"w") # Opens file for writing.Creates this file doesn't exist.
f.write("First line 1.\n")
f.writelines("First line 2.")
# b.py
from a import add_func # Also can be : import a
print ("Import add_func from module a")
print ("Result of 1 plus 2 is: ")
print (add_func(1,2)) # If using "import a" , then here should be "a.add_func"
import os
import os.path
# os,os.path里包含大多数文件访问的函数,所以要先引入它们.
# 请按照你的实际情况修改这个路径
rootdir = " d:/download "
for parent, dirnames, filenames in os.walk(rootdir):
# case 1:
for dirname in dirnames:
print ( " parent is: " + parent)
print ( " dirname is: " + dirname)
# case 2
for filename in filenames:
print ( " parent is: " + parent)
print ( " filename with full path : " + os.path.join(parent, filename))
i = 0
for dirpath,dirnames,filenames in os.walk(copydir):
for name in filenames:
oldpath = os.path.join(dirpath,name)
newpath = omitPrefix(dirpath,prefix)
print ( " backdir is: " + backdir )
newpath = os.path.join(backdir,newpath)
print ( " newpath is: " + newpath)
if os.path.exists(newpath) != True:
os.makedirs(newpath)
newpath = os.path.join(newpath,name)
print ( " From: " + oldpath + " to: " + newpath)
shutil.copyfile(oldpath,newpath)
i = i + 1
return i