Write a program to find the random numbers from 1 to 100 and call the function for 500 times and print how many times each number has been repeated
import random
def myrandom():
return random.randint(1,100)
#2. Call the function 500 times and save the results into a list.
r=[]
for x in range(500):
r.append(myrandom())
#3. Print how many times each number has repeated
for x in set(r):
print( x,r.count(x))
Write a program to print the size of the file and the time file was created
import os,time
size=os.stat(“C:/Users/exercise.py”).st_size
ctime=os.stat(“C:/Users/exercise.py”).st_ctime
print (“Size of the file :”,size)
print (“Created :”,ctime)
print (“Current time: “,time.time())
print (“Current time – Created time :”,time.time() – ctime)
Example for datetime module
import datetime
d1 = datetime.date(2008, 3, 12)
print(‘d1:’, d1)
d2 = d1.replace(year=2015,day=4,month=10)
d3=d1.replace(day=10)
d4=d1.replace(month=10)
print(‘d2:’, d2)
print(‘d3:’,d3)
print(‘d4:’,d4)
Example of datetime module
import datetime
today = datetime.date.today()
print (‘Today :’, today)
one_day = datetime.timedelta(weeks=2)
yesterday = today – one_day
print( yesterday)
print (‘Yesterday:’, yesterday)
tomorrow = today + one_day
print( ‘Tomorrow :’, tomorrow)
print( ‘tomorrow – yesterday:’, tomorrow – yesterday)
print( ‘yesterday – tomorrow:’, yesterday – tomorrow)
Example of os module functions
import os
print(os.getcwd()) #get working dir
os.chdir(“c:\python27”) #change dir
print(os.getcwd()) #get working dir
os.system(“notepad.exe”) #run a os command from python
Write a program to compress all py files from a folder and write the files in to zip file
import os
import zipfile
import glob
myhome=”c:\users\pythonfiles”
myzip=”c:\users\pythonfiles.zip”
#go to the home directory
os.chdir(myhome)
#open an empty zip file
z=zipfile.ZipFile(myzip,’w’)
#select all the *.py files
pyfiles=glob.glob(“*.py”)
#compress and write the files into the zip file
for file in pyfiles:
print(“Zipping file {}”.format(file))
z.write(file)
#close zip file
z.close()
print(“Zipping Complete”)
Nellorean 