ques1.py

def my (a , b ):
    #function declaration  a , b parameters hai
    #question mein     my(12,'abc123') likha hai  toh a mein 12 jayega aur b= 'abc123'

    ans =0

    for i in b:
        #agar i digit hai . if( ord(i)>=ord('0') and ord(i)<=ord('9')) iske jagah  yeh bhi likh skta hai //
        if(i.isdigit()):

            ans= ans*10+ int(i)  # int(i)  i  ko intigeger mein covrt krega
                                    # i= '1' ,  int(i) se woh 1 hojayegaa

    ans= ans+a   # ans = 123  a = 12  123 +12 = 135
    return ans


print my(12,'abc123')   # yeh function call hai  ismein parameters dala hai tu 12,'abc123'   toh 12  a mein jayega aur abc123  b mei

ques2.py

numerator = 2.0
denominator= 9.0
ans = 0.0    # 0.0 becoz ans toh decimal float mein hi hoga  warna example 0 +  3/2  =1 hoga kyun 3/2 integer division hoga

n= input('enter how many terms in the series ')

for i in range(n):
    ans=ans+(numerator/denominator)*(-1**i) #i 0 se n-1
    print str( numerator)+'/'+str(denominator)  ,# yeh wala print statement ke bina run krke dekhna
    numerator = numerator + 3
    denominator=denominator+4

print ans