PEP-8 import conventions

Author: duke-mai

check_prime.py

@@ -1,15 +1,14 @@
-# Author:   Tan Duc Mai
-# Email:    [email protected]
+# Author:       Tan Duc Mai
+# Email:        [email protected]
+# Description:  Three different functions to check whether a given number is a prime.
+#               Return True if it is a prime, False otherwise.
+#               Those three functions, from a to c, decreases in efficiency
+#               (takes longer time).
 
-"""
-Three different functions to check whether a given number is a prime.
-Return True if it is a prime, False otherwise.
-Those three functions, from a to c, decreases in efficiency (takes longer time).
-"""
+from math import sqrt
 
 
 def is_prime_a(n):
-    from math import sqrt
     if n < 2:
         return False
     sqrt_n = int(sqrt(n))