Python_Functions_Advancedby_KMSolutions.pptx

Python_Functions_Advancedby_KMSolutions.pptx

• 1.
  Welcome to Advance Functions in Python
• 2.
  Enumerate Function inPython print(names_list) #for i in names_list: # print(i) # looping with index #for i in range(len(names_list)): # print(i,names_list[i]) for i,j in enumerate(names_list,1): print(i,j)
• 3.
  Iterators • Iterators andIterables in Python • Ex1 - lists for loop list1=[1 ,2,3,5.5 ,6.7,”ga nesh”] for I in list1: prin
• 4.
  Iterators • Ex3 - setsfor loop set1={1 ,2,3,5.5 ,6.7,”ga nesh”} for I in set1: print( i) Ex4 –
• 5.
  Iterators • To printlist of elements without loop • 2 methods • Using Index Ex : days_list=[“Sun”,”Mon”,”Tue”,”Wed”,”Thu”] i=0 while I <= len(days_list): print(days_list[i]) i+=1
• 6.
  Iterators • Next methodis using iterator protocol • Way of working iterators and iterables for i in list1: # list1 is iterables print(i) # i is iterator objects Inbuilt Function is L1=iter(list1) next(L1) Next(L2) Note : lists/tuples/sets/d
• 7.
  Example import cx_Oracle con=cx_Oracle.connect('hr/hr@xe') mycursor=con.cursor() mycursor.execute('select *from employees') names_list=[ names[1] for names in mycursor] #print(names_list) mynames=iter(names_list) print(next(mynames)) print(next(mynames)) print(next(mynames)) print(next(mynames)) con.close()
• 8.
  def print_iterables(n): names=iter(n) while True: try: nxt=next(names) exceptStopIteration: break else: print(nxt) x=print_iterables(nam es_list) print(x)
• 9.
  Generators Function • Generatorfunction is a function which returns generator-iterator with the help of yield keyword Generator-iterator is special type of iterator ie. generator function will Generate iterators All generator-iterator are iterators but all iterators are not generator- iterators yield is like a return in normal function
• 10.
  def disp_sq(mx_no): x=1 while x<mx_no: print(x*x) x+=1 ifx>mx_no: break disp_sq(10)
• 11.
  Generator Example 1 defdisp_nos(mx_no): x=1 while x < mx_no: yield x*x x+=1 if x>mx_no: break no=disp_nos(10) print(next(no))
• 12.
  Generator Example 2 defdisp_fibo_nos(nos): a,b=0,1 while True: c=a+b if c<=nos: yield c a=b b=c else: break n=disp_fibo_nos(10) print(next(n)) print(next(n)) print(next(n)) print(next(n))