Common Functions and Usage Examples of python

This paper describes the common functions and usage of python with examples. Share it for your reference, as follows:

Custom function instance

#  Definition 1 Functions 
def printme( str ):
  " Print any incoming strings "
  print str;
  return;
#  Use this function 
printme("chtml.cn");

Run results:

chtml.cn

Delete 1 file function instance

def dellFile(pathFile):
  import os
  filename = pathFile
  if os.path.exist(filename):
  os.remove(filename)
  print filename
  return;

python Printing Gold Tower

def printPyramid(level):
  for i in range(level):
    print ' ' * (level-i-1) + '*' * (2*i+1)
printPyramid(5)

Run results:

*
***
*****
*******
*********

python writes 99 multiplication table

print '\n9x9 Table\n'
for i in range(1, 10) :
  for j in range(1, i+1) :
    print j, 'x', i, '=', j*i, '\t',
    # print '%d x %d = %d\t' %(j, i, j*i),
  print '\n'
print '\nDone!'

Run results:

9x9 Table

1 x 1 = 1

1 x 2 = 2
2 x 2 = 4

1 x 3 = 3
2 x 3 = 6
3 x 3 = 9

1 x 4 = 4
2 x 4 = 8
3 x 4 = 12
4 x 4 = 16

1 x 5 = 5
2 x 5 = 10
3 x 5 = 15
4 x 5 = 20
5 x 5 = 25

1 x 6 = 6
2 x 6 = 12
3 x 6 = 18
4 x 6 = 24
5 x 6 = 30
6 x 6 = 36

1 x 7 = 7
2 x 7 = 14
3 x 7 = 21
4 x 7 = 28
5 x 7 = 35
6 x 7 = 42
7 x 7 = 49

1 x 8 = 8
2 x 8 = 16
3 x 8 = 24
4 x 8 = 32
5 x 8 = 40
6 x 8 = 48
7 x 8 = 56
8 x 8 = 64

1 x 9 = 9
2 x 9 = 18
3 x 9 = 27
4 x 9 = 36
5 x 9 = 45
6 x 9 = 54
7 x 9 = 63
8 x 9 = 72
9 x 9 = 81

Done!

Read the contents of a file

all_the_text = open('thefile.txt').read( )

Read all the files in the folder

all_the_data = open('abinfile','rb').read( )

Readers who are interested in Python can check the topics of this site: "Summary of Python Function Use Skills", "Introduction and Advanced Tutorial of Python Object-Oriented Programming", "Data Structure and Algorithm Tutorial of Python", "Summary of Python String Operation Skills", "Summary of Python Coding Operation Skills" and "Introduction and Advanced Classic Tutorial of Python"

I hope this paper is helpful to everyone's Python programming.