auto save

1.py

+with open('a.csv','w') as aa:
+    pass
+
+
+
+# sum=0
+# for i in range(101):#[0,1,2,3,4...1000]
+#     sum=sum+i
+# print(sum)
+
+# sum=0
+# i=1
+# while i<101:
+#     sum=sum+i
+#     i=i+1
+# print(sum)
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+# for i in range(10):#索引
+#     print(a[i])
+# for i in a:
+#     print(i)
+# i=0
+# while i<10:
+#     print(a[i])
+#     i=i+1
\ No newline at end of file