Workshop programs
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The document contains code snippets for several Python programs that demonstrate various Python features: - The First.py program prints lines and gets user input - The list_comp.py program shows looping vs list comprehension to create lists - The fav_movies.py program demonstrates reading from and writing to files - The get_particular_line.py program reads a specific line from a file - The zip_length.py program reads files from a zip archive and prints their lengths - The details.py program gets system details like name and IP address - The password_gen.py program generates a random 10 character password
![Python examples
Compile Python program:python filename.py
First.py
#! /usr/bin/env python
#Above is valid only if you are using the script in linux and you can
understand this is comment :)// /*
import os##include<os.h>
print(50*"-")#will print '-' fifty times
print("file name :%s"%(__file__))#will reveal current file name
printf("%s",__file__)
name=raw_input("What is your name :")#get i/p from user
print ("Name:"+name)#print the name
print(50*"=")
list_comp.py
#! /usr/bin/env python
def looping():
x=[]
for y in range(20):
if y%2 == 0:
x.append(y)
print x
def list_comp():
x=[y for y in range(20) if y%2 ==0 ]
print x
looping()
list_comp()
import dis
dis.dis(looping)
dis.dis(list_comp)](https://image.slidesharecdn.com/workshopprograms-110307003521-phpapp02/85/Workshop-programs-1-320.jpg)
![fav_movies.py
#! /usr/bin/env python
"""This file contains few ways how one can read and write content to
file in python"""
count=0
file="fav_movies.txt"
file_="fav_movie_list.txt"
movie_list=[]
def write_to_file():
'''Writing string to file'''
global file,count
fp=open(file,'w')
print 50*"="
print("Enter 5 movie names you like ")
while count < 5 :
movie=(raw_input("Enter the fav movie:"))+"n"
movie_list.append(movie)
fp.write(movie)
count+=1
fp.close()
print 50*"="
def read_a_line():
global file
fp=open(file,'r')
fp.close()
print ("n Reading one line")
def readlines():
global file
fp=open(file,"r")
print fp.readline()#will read only one line
fp.close()
print "="*50
def write_list():
global file_,movie_list
print("Writing entire list into a file ")
f=open(file_,"w")
f.writelines(movie_list)#write entire list to a file
f.close()
print "="*50
def read_using_for():
global file](https://image.slidesharecdn.com/workshopprograms-110307003521-phpapp02/85/Workshop-programs-2-320.jpg)
![password_gen.py
import string,random
chars=string.lowercase+string.uppercase+string.digits
print ''.join([random.choice(chars) for i in range(0,10)])](https://image.slidesharecdn.com/workshopprograms-110307003521-phpapp02/85/Workshop-programs-4-320.jpg)
Workshop programs
- 1. Python examples Compile Python program:python filename.py First.py #! /usr/bin/env python #Above is valid only if you are using the script in linux and you can understand this is comment :)// /* import os##include<os.h> print(50*"-")#will print '-' fifty times print("file name :%s"%(__file__))#will reveal current file name printf("%s",__file__) name=raw_input("What is your name :")#get i/p from user print ("Name:"+name)#print the name print(50*"=") list_comp.py #! /usr/bin/env python def looping(): x=[] for y in range(20): if y%2 == 0: x.append(y) print x def list_comp(): x=[y for y in range(20) if y%2 ==0 ] print x looping() list_comp() import dis dis.dis(looping) dis.dis(list_comp)
- 2. fav_movies.py #! /usr/bin/env python """This file contains few ways how one can read and write content to file in python""" count=0 file="fav_movies.txt" file_="fav_movie_list.txt" movie_list=[] def write_to_file(): '''Writing string to file''' global file,count fp=open(file,'w') print 50*"=" print("Enter 5 movie names you like ") while count < 5 : movie=(raw_input("Enter the fav movie:"))+"n" movie_list.append(movie) fp.write(movie) count+=1 fp.close() print 50*"=" def read_a_line(): global file fp=open(file,'r') fp.close() print ("n Reading one line") def readlines(): global file fp=open(file,"r") print fp.readline()#will read only one line fp.close() print "="*50 def write_list(): global file_,movie_list print("Writing entire list into a file ") f=open(file_,"w") f.writelines(movie_list)#write entire list to a file f.close() print "="*50 def read_using_for(): global file
- 3. print ("reading input using for loop") for line in open(file): print line print "="*50 def one_liner(): global file print ("read entire contents in a single line") print(open(file).read())#will read all lines in one stretch print 50*'=' write_to_file() print ("doc for %s:%s "% (write_to_file.func_name,write_to_file.__doc__)) read_a_line() readlines() write_list() read_using_for() one_liner() print ("__doc__",__doc__) get_particular_line.py #! /usr/bin/env python file="text.txt" import linecache theline=linecache.getline(file,2) print theline zip_length.py #! /usr/bin/env python import zipfile z=zipfile.ZipFile("day1.odp.zip","r") for filename in z.namelist(): print "File:",filename bytes=z.read(filename) print 'has',len(bytes),'bytes' details.py #! /usr/bin/env python import socket myname=socket.getfqdn(socket.gethostname()) myaddr=socket.gethostbyname(myname) print "System name:%s"%(myname),"Ip:",myaddr