Question

PYTHON 3 PROGRAM PLEASE

18.19* (Prime number iterator) Write an iterator class for prime numbers. Invoking the __next__() method returns the next prime number. Write a test program that displays all prime numbers less than 10000.

Answer 1

Prime Number iterator (Python3):

class iterator: #Iterator class
def __init__(self,num): #Constructor for our class
self.maximum = num #Setting our maximum value attribute

def __iter__(self): #iter method
self.number = 1
return self

def __next__(self): #__next__() method which returns next element in an object
if self.maximum > self.number:
self.number += 1
start = 2
while start < (self.number//2 + 1): #Prime number program starts...
if self.number % start == 0:
self.number += 1

if self.number > self.maximum: #If the self.number is greater than our maximum
raise StopIteration #Raise StopIteration
start = 1   
start += 1 #Incrementing start
else:
return self.number #If the number in the series is a prime number return that number
else:
raise StopIteration

itr = iterator(10000) #Creating "itr" object of the class "iterator"
obj = itr.__iter__() #Setting "obj" as "itr.__iter__()"

try:
while True:
print (obj.__next__(), end = " ") #Printing the prime number using "__next__()" method
except: #Except block is, if the "__next__()" method raises an exception..
pass

#End of the code..

CODE implementation:

File Edit Format Run Options Window Help class iterator: definit (self, num): self.maximum = num #Iterator class #Constructor for our class #Setting our maximum value attribute #iter method def iter (self): self.number = 1 return self #_next_() method which returns next element in an object def next (self): if self.maximum > self. number: self.number += 1 start = 2 while start < (self.number//2 + 1) : if self.number % start == 0: self. number += 1 #Prime number program starts... #If the self.number is greater than our maximum #Raise Stop Iteration #Incrementing start if self.number > self.maximum: raise StopIteration start = 1 start += 1 else: return self.number else: raise StopIteration #If the number in the series is a prime number return that number itr = iterator (10000) obj = itr. iter () #Creating "it" object of the class "iterator" #Setting "obj" as "itr. iter (" try: while True: print (obj.next except: pass ()end = " ") # Printing the prime number using " next (" method #Except block is, if the " next (" method raises an exception..

Part of the output:

2 3 5711 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97 101 103 1 07 109 113 127 131 137 139 149 151 157 163 167 173 179 181 191 193 197 199 211 2 23 227 229 233 239 241 251 257 263 269 271 277 281 283 293 307 311 313 317 331 3 37 347 349 353 359 367 373 379 383 389 397 401 409 419 421 431 433 439 443 449 4 57 461 463 467 479 487 491 499 503 509 521 523 541 547 557 563 569 571 577 587 5 ו 709 701 691 683 677 673 661 659 653 647 643 641 631 617619 613 607 601 599 93 19 727 733 739 743 751 757 761 769 773 787 797 809 811 821 823 827 829 839 853 8 57 859 863 877 881 883 887 907 911 919 929 937 941 947 953 967 971 977 983 991 9 97 1009 1013 1019 1021 1031 1033 1039 1049 1051 1061 1063 1069 1087 1091 1093 10 97 11031109 11171123 1129 1151 1153 1163 1171 1181 1187 1193 1201 1213 121712 23 1229 1231 1237 1249 1259 1277 1279 1283 1289 1291 1297 1301 1303 1307 1319 13 21 1327 1361 1367 1373 1381 1399 1409 1423 1427 1429 1433 1439 1447 1451 1453 14 59 1471 1481 1483 1487 1489 1493 1499 1511 1523 1531 1543 1549 1553 1559 1567 15 71 1579 1583 1597 1601 1607 1609 1613 1619 1621 1627 1637 1657 1663 1667 1669 16 93 1697 1699 1709 1721 1723 1733 1741 1747 1753 1759 1777 1783 1787 1789 1801 18 11 1823 1831 1847 1861 1867 1871 1873 1877 1879 1889 1901 1907 1913 1931 1933 19 49 1951 1973 1979 1987 1993 1997 1999 2003 2011 2017 2027 2029 2039 2053 2063 20 69 2031 2033 2037 2089 2099 2111 2113 2129 2131 2137 2141 2143 2153 2161 2179 22 03 2207 2213 2221 2237 2239 2243 2251 2267 2269 2273 2281 2287 2293 2297 230923 11 2333 2339 2341 2347 2351 2357 2371 2277 2381 2383 2389 2393 2399 2411 241724 23 2437 2441 2447 2459 2467 2473 2477 2503 2521 2531 2539 2543 2549 2551 2557 25 79 2591 2593 2609 26172621 2633 2647 2657 2659 2663 2671 2677 2683 2687 2689 26 93 2699 2707 2711 2713 2719 2729 2731 2741 2749 2753 2767 2777 2789 2791 2797 28 01 2803 2819 2833 2037 2043 2051 2057 2861 2879 2887 2897 2903 2909 2917 2927 29 39 2953 2957 2963 2969 2971 2999 2001 3011 3019 3023 3037 3041 2049 3061 3067 30 793083 3089 310931193121 3137 3163 3167 3169 3181 3187 3191 3203 3209 321732 21 322932513253 3257 3259 3271 3299 3301 3307 3313 3319 3323 3329 3331 3343 33 47 3359 3361 3371 3373 3389 3391 3407 34133433 3449 3457 3461 3463 3467 3469 34 91 3499 3511 35173527 3529 3533 3539 3541 35473557 3559 3571 3581 3583 3593 36 07 3613 36173623 3631 3637 3643 3659 3671 3673 3677 3691 3697 3701 3709 3719 37 י 1 • הר חרדי רידר דה - דף ף י הר - זהר 1-הר – 4 הר ררהר וההר וההר וההר דה דף בחדר חדרה

NOTE:

# Be aware of the indentation while copying the code into your editor by observing the above uploaded CODE pictures...

# Here when the "__next__()" method is invoked it returns the next element in the object that we have created.

# Any questions or clarifications regarding this question can be asked in the comments section...