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t.py

+#第1题
+# text = "hello world!"
+# for i in text:
+#     print(i)
+
+#第2题
+# str1 = "bellcode"
+# print(str1[4:])
+
+#第3题
+# text = ['p','y','t','h','o','n']
+# print("".join(text))
+
+#第4题
+# str1 = "本节课我们学习文字加密"
+# str2 = "用python进行"
+# list1 = list(str1)
+# list1.insert(7,str2)
+# print("".join(list1))
+
+#第5题
+import random
+
+int1 = 0
+int2 = 0
+int3 = 0
+for i in range(3000):
+    x = random.randint(8,10)
+    if x == 8:
+        int1+=1
+    elif x == 9:
+        int2+=1
+    else :
+        int3+=1
+print(int1,int2,int3)
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