更新

Python-100-Days/Day01-15/Day11/file3.py

@@ -0,0 +1,28 @@
+"""
+
+写文本文件
+将100以内的素数写入到文件中
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-13
+
+"""
+
+from math import sqrt
+
+
+def is_prime(n):
+	for factor in range(2, int(sqrt(n)) + 1):
+		if n % factor == 0:
+			return False
+	return True
+
+
+# 试一试有什么不一样
+# with open('prime.txt', 'a') as f:
+with open('prime.txt', 'w') as f:
+	for num in range(2, 100):
+		if is_prime(num):
+			f.write(str(num) + '\n')
+print('写入完成!')