[Python] Python. How to delete file after its been moved/copied?

I want a zip in source_dir to be copied/moved to dst location. The zip gets copied to the dist path. However, how do I get rid of the source_dir file? I tried move option, which removed the source_dir file but move command can't move a zip if theres a zip with a existing name. The copy method works and simply overwrites it but leaves a zip in source_dir. Below is my code, it copies successfully but zip file does not get removed from source_dir. What am I doing wrong?

def Movezips(self, email):
time.sleep(2)
print("starting moving")
source_dir = 'C:/Download'+email+'/'
dst = 'E:/BackUpZip/'+email
Path(dst).mkdir(parents=True, exist_ok=True)
dst=dst+'/'
files = glob.iglob(os.path.join(source_dir, "*.zip"))
for file in files:
if os.path.isfile(file):
shutil.copy(file, dst)

for file in files:
if os.path.isfile(file):
shutil.rmtree(file)

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