Pygame error 'pow expected 2 arguments, got 1' - pygame

Question

They pygame game i made has run into an error i cannot figure out how to fix. I am new to pygame. I am using pycharm and python version 3.
The error is stopping me from doing anything and it won't even let me run it
Here is the error
TypeError: pow expected 2 arguments, got 1
Here is the code:
import math
import random
import pygame
pygame.init()
# Screen (Pixels by Pixels (X and Y (X = right and left Y = up and down)))
screen = pygame.display.set_mode((800, 600))
running = True
# Title and Icon
pygame.display.set_caption("Space Invaders")
icon = pygame.image.load('Icon.png')
pygame.display.set_icon(icon)
# Player Icon/Image
playerimg = pygame.image.load('Player.png')
playerX = 370
playerY = 480
playerX_change = 0
def player(x, y):
# Blit means Draw
screen.blit(playerimg, (x, y))
def enemy(x, y):
# Blit means Draw
screen.blit(enemyimg, (x, y))
def fire_bullet(x, y):
global bullet_state
bullet_state = "fire"
screen.blit(bulletimg, (x + 16, y + 10))
def isCollision(enemyX, enemyY, bulletX, bulletY):
distance = math.sqrt(math.pow(enemyX - bulletX, 2) + math.pow(math.pow(enemyY - bulletY,2)))
if distance < 27:
return True
else:
return False
background = pygame.image.load('247.jpg')
enemyimg = pygame.image.load('space-invaders.png')
enemyX = random.randint(0, 800)
enemyY = random.randint(50, 150)
enemyX_change = 4
enemyY_change = 40
bulletimg = pygame.image.load('bullet.png')
bulletX = 0
bulletY = 450
bulletX_change = 480
bulletY_change = 10
bullet_state = "ready"
score = 0
# Game loop (Put most of code for game in this loop)
while running:
screen.fill((255, 0, 0))
# BAckground
screen.blit(background, (0, 0))
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
# if keystroke is pressed check whether is right or left
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
playerX_change = -5
if event.key == pygame.K_RIGHT:
playerX_change = 5
if event.key == pygame.K_SPACE:
if bullet_state == "ready":
bulletX = playerX
fire_bullet(playerX, bulletY)
elif event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
playerX_change = 0
# RGB (screen.fill) = red green blue
# 5 = 5 + - 0.1 -> 5 = 5 - 0.1
# making so nothing can go out of bounds
enemyX += enemyX_change
if enemyX <= 0:
enemyX_change = 4
enemyY += enemyY_change
elif enemyX >= 736:
enemyX_change = -4
enemyY += enemyY_change
playerX += playerX_change
if playerX <= 0:
playerX = 0
elif playerX >= 736:
playerX = 736
# Bullet movement
if bulletY <= 0:
bulletY = 480
bullet_state = "ready"
if bullet_state == "fire":
fire_bullet(bulletX, bulletY)
bulletY -= bulletY_change
# Collison
collision = isCollision(enemyX,enemyY,bulletX,bulletY)
if collision:
bulletY = 480
bullet_state = "ready"
score +=1
player(playerX, playerY)
enemy(enemyX, enemyY)
pygame.display.update()

Answer 1

I believe you are trying to do this:
c = sqrt(pow(a,2) + pow(b,2))
But your code has one pow() too many. Happens to me too, when I make I make game sounds in my head, while coding (pew pew pew)
Try to remove one pow()
from
math.pow(math.pow(enemyY - bulletY,2))
to
math.pow(enemyY - bulletY,2)