python常用函数与用法示例

本文实例讲述了python常用函数与用法。分享给大家供大家参考，具体如下：

自定义函数实例

# 定义一个函数
def printme( str ):
  "打印任何传入的字符串"
  print str;
  return;
# 使用这个函数
printme("chtml.cn");

运行结果：

chtml.cn

删除一个文件函数实例

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

python打印金子塔

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

运行结果：

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

python写九九乘法表

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!'

运行结果：

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!

读取文件内容

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

读取文件夹里的所有文件

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

希望本文所述对大家Python程序设计有所帮助。

原文链接：https://blog.csdn.net/hj960511/article/details/52839627