basic pythone programs

Author: heysushil

.vscode/settings.json

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+{
+    "python.testing.pytestArgs": [
+        "."
+    ],
+    "python.testing.unittestEnabled": false,
+    "python.testing.nosetestsEnabled": false,
+    "python.testing.pytestEnabled": true
+}

__pycache__/module.cpython-38.pyc

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+demolist = [1,2,3,4,5,6,7]
+# demolist.remove(1)
+print(demolist.count(2))
+print(demolist[:])
+userdetail = [
+    'name','chaudhary suhsil',
+    'email','sushil@gmail.com'
+]
+userdetail[0]='sushil'
+userdetail.extend([1,2,3])
+# print(count(userdetail))
+print(userdetail)
+
+# pworser in case of lsit comparhension
+pow2 = [2 ** x for x in range(10)]
+print(pow2)
+
+# comperhansion list is awesome
+newpow = [2 ** x for x in range(10) if(x > 5)]
+print(newpow)
+
+# tuple
+# this is called tuple packing
+newtup = 3,4.6,'dog'
+print(newtup)
+# this tuple unpacking
+a, b, c = newtup
+print(a)
+print(b)
+print(c)
+
+# string 
+count = 0
+for letter in 'hello sushil':
+    if letter == 'l':
+        count += 1
+print(count,'letter found')
+myname = 'sushil'
+myname_enumarate = list(enumerate(myname))
+print(myname_enumarate)
+print(len(myname))
+print('hello, "kyas haal hai"')
+
+# set are mutable and in between set also use all datatypes which are mutable
+print(type({1,2,3,4,'hello'}))
+print({1,2,3,4})
+myset = {'hello','hi','how','areyou'}
+print(myset)
+myset.add('sushil')
+myset.update(['suraj','sunil'])
+myset.discard('hi')
+myset.remove('how')
+print(myset)
+# set use for performing mathematical operation 
+aset = {1,2,3,4,5}
+bset = {5,6,7,8}
+print('set union: ',aset|bset)
+print('using unio function: ',aset.union(bset))
+print('intersion:',aset & bset)
+print('using itersetion fun:',aset.intersection(bset))
+print('difference:',aset-bset)
+print('deferencs fun:',aset.difference(bset))
+print('Sementric difference:',aset^bset)
+print('semenmtric fun:',aset.symmetric_difference(bset))
+print('print in iteration using for:')
+for letter in aset:
+    print('for loop:',letter)
+print('frozen set')
+afroz = frozenset([1,2,3,4,5])
+bfroz = frozenset([6,7,8,9])
+print('disjoint bothe:',afroz.isdisjoint(bfroz))
+print('diffrence in frozen:',afroz.difference(bfroz))
+
+# dictonary
+print('use of dictornay is same as set but its use key value and use curly backet')
+adict = {'name': 'sushil','email':'sushil@gmail.com'}
+adict['name'] = 'chaudhary sushil'
+adict['mobile'] = '89899889'
+print(adict.get('name'))
+print(adict)
+# print(adict.popitem())
+odddict = {x: x*x for x in range(6) if x % 2 == 1}
+print({x: x*x for x in range(6) if x%2==1})
+print(odddict)
+for i in odddict:
+    print('In interation:',odddict[i])
+
+

datatype.py

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+# print('Hello')
+# a=3
+# if a <= 3:
+#     print('Value of a:',a)
+#     print('Hello next print')
+
+# # variables 
+# a = 'hello'
+# a,b,c = 1,2,3
+# print(a)
+# print(b)
+# print(c)
+# print(type(a))
+
+# name = 'python'
+# # print('Hello '+name)
+
+# # global var
+# funname = 'hello python'  #this is a global variable
+
+# def demofunction():
+#     print(name)
+
+# demofunction()
+# # a->b
+# # array['sadfa','asdf','sdf']
+# # array[0]
+
+# # data type conversiton
+
+# a = '1'
+# b = 1.0
+# print(a)
+# print(type(b))
+# print(type(int(b)))
+
+import random
+
+print(random.randrange(2000,2005))
+
+string = '''hello
+hi
+how are you'''
+astirng = ' hello python '
+alist = ['hello','hi','how','are','you']
+print(alist[-1])
+print(astirng[-9])
+print(astirng.islower())
+print(astirng.replace('hello','hi'))
+print(len(astirng))
+num = 46
+print('hell' in astirng)
+print('Hello number+',num)
+print('hello {0}, welcome to {1}'.format('Vanshika','Python'))
+print("Hello \"New\" Python")
+print(astirng.count('h'))
+# print(type(astirng.translate))
+
+avalue = 5
+b = 6
+# avalue += 7
+print('b value:',b)
+print('SUm of avalue is:',avalue)
+print(astirng.islower())
+if (not(avalue == 6)):
+    print('Get bothe value')
+listval = [1, 2, 3, 4]
+print(next(iter(int,listval)))
+# print(next(iter(listval)))
+
+# for num in [1,2,3,4]:
+#     print(num)

demo.py

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+# sys use to get exceptions
+import sys
+
+rendomList = ['a',0,2]
+
+for num in rendomList:
+    try:
+        print('Value print is: ',num)
+        r = 1/int(num)
+        break
+    except:
+        print('Oppss sys problem: ',sys.exc_info()[0],'occured')
+        print('Next entry')
+print('The receprocal of',num,'is',r)        
+
+
+# create class
+# parent class
+class Birds:
+
+    def __init__(self):
+        print('Bird is ready')
+
+    def whoisThis(self):
+        print('Bird')
+    def swim(self):
+        print('Swim faster')
+
+# child class inherit parent calss Birds
+class Piggen(Birds):
+    
+    def __init__(self):
+        # call super class
+        super.__init__()
+        print('Pegun is ready')
+
+    def whoisThis(self):
+        print('Pegun is ready')
+
+    
+
+print(Birds().whoisThis())

exception.py

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+import os
+
+os.getcwd()
+print(os.getcwdb())
+print(os.listdir())
+# print(check)
+# print(os.mkdir('testdir'))
+print(os.listdir())
+# os.mkdir('testdir')
+# create file in directory
+fname = open('testdir/text.txt', 'a')
+fwrite = open('testdir/text.txt','w')
+fwrite.write('Hello sushil how are you\nthis is firs directory inccer page')
+# read the file
+# fread = open('testdir/text.txt','r')
+print(open('testdir/text.txt', 'r').read())
+# print(os.remove('testdir/text.txt'))
+
+# use shutil modul to delete non empty dierecoty
+import shutil
+shutil.rmtree('testdir')
+# fname.write = 'hello sushil\nthis is a dmeo file which i just created ok.'
+# print(fname.read())
+# print(os.rename('testdir','newtest'))
+# print(os.rmdir('newtest'))
+print(os.listdir())
+
+def funcname():
+    pass
+
+# function functionName(){
+#     function body
+# }
+a = '1'
+b = 1
+print(a)

fdirectory.py

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+print('File operations')
+# f = open('file.txt')
+# print('Is file open:',f)
+# newf = open('hello.txt', mode='a')
+# print('Create new file hello.txt:',newf)
+# f.close()
+# newf.close()
+
+# use safe mode avop mode is not safe on so use tye filan
+try:
+    f = open('file.txt')
+    # best way to use the is - with 
+    
+    with open('file.txt',mode='w') as f:
+        f.write('kya baat hai maza hi aa gaya. mast hai python hain na\n')
+        f.write('ye jo bate hai ye to hoti hi rangei\n\n')
+        f.write('magar agar kaha jaye to maja aata hai python me aur hai hi majedat')
+        # f.write('this is my first file\n')
+        # f.write('no problem to wirht here\n')
+        # f.write('it\'s great idea to writh in the file by python.\n\n')
+        # f.write('really awesome')        
+    # with open('file.txt','r') as f:
+    #     print(f)
+
+    # newf = open('hello.txt',mode='a')
+    # print('created file:',f)
+    # print('Create new file using a:',newf)
+finally:
+    f.close()
+    # newf.close()
+
+# read('file.txt')
+readfile = open('file.txt','r')
+print(open('file.txt', 'r').read())
+print('current file position:',readfile.tell())
+print('bright currsor to initial posion',readfile.seek(0))
+
+# read file in loop
+print('\n\n')
+for i in readfile:
+    print(i,end='')  #end use to stope reapeting double new line
+
+print(readfile.readline())

file.py

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+kya baat hai maza hi aa gaya. mast hai python hain na
+ye jo bate hai ye to hoti hi rangei
+
+magar agar kaha jaye to maja aata hai python me aur hai hi majedat

file.txt

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+# if else stament
+
+# check negative or possitive case here
+num = float(input('Enter your number:'))
+if num >= 0:
+    if num >= 1:
+        print ('Num value is possitive')
+    else:
+        print('Value is zero')
+else:
+        print ('Value is negative')

hello.txt

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+# loop in python using 2 paremeters 
+# first is the variable which initialize before start
+# second is the sequesnce in which the loop rounding
+# like in py use a list,tuple,dictroney, string which provide many number of values
+
+# --------------------------------------------------------------------
+# ----------------FINAL ABOUT LOOP----------------------
+# -----------------------------------------------------------------------
+# loop is using only 2 parametres on loop case in for loop firs is the initialization value wich you can direct initialize here no need to initialize before and next the the way of how the loop itirate the same for the time .
+# in this case on simple case on 2nd paremeter pass the list,dictonary,string value of repet the loop until not finish the value on these.
+# on other side if we want to repeate the loop for same type of number like print 0 to 100 number in loop. In this casea py provides a range() predefine function which you also use direct without use of loop in just print case
+# but on print case it use also if you want to use the sam ein case of loop then everything work same just change the second paremeter.
+# like for initialize-value in list-value:
+# in this case the list-value will use in range and in rage also use len-for get the length of the list to repect the loop untile get the end value
+# in this case the for loop lookes like
+# for i in range(len(itemsvalue))
+
+# list of number
+listnum = ['hello','hai','how','are','you']
+# print(len(listnum))
+
+for i in range(len(listnum)):
+    print(listnum[i])
+
+# print(list(range(0,10)))
+# print(list(range(0,100)))
+digit = [1,2,3]
+for hello in digit:
+    print(hello)
+    # continue
+else:
+    print('No item left')   
+
+# ----------------------------------
+#  WHILE LOOP
+n = 10
+sum = 0
+i=1
+while i <= n:
+    sum = sum + i
+    # print(len(n))
+    i = i+1
+print('get',sum)
+
+# whicle with else
+counter = 0
+while counter < 3:
+    print('get counter')
+    counter = counter+1
+else:
+    print('stop counter')
+
+for val in 'string':
+    if val == 'i':
+        continue
+    print(val)
+        # break
+else:
+    print('finshed string')
+
+# function
+def simplefun(name):
+    return 'Hello, ' + name + ' how are you.'
+    # return 
+
+print (simplefun('Roshan')) 
+
+# lambda function
+oldlist = [1,2,3,4,5,6,7,8,9]
+newlist = list(map(lambda x: x*2, oldlist))
+print('New list is: ',newlist)
+
+

ifelse.py

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+def sumOfTwo(num1, num2):
+    # print(num1 + ' and ' + num2 )
+    result = num1 + num2
+    return result