Merge pull request #2412 from xinwu2064/master

自学训练营学习1群  1901010060 day5homework

Author: shengzhulst

exercises/1901010060/1001S01E05_array.py

@@ -0,0 +1,24 @@
+list_1=[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
+list_1.reverse()   #反转元素的位置
+print(list_1)
+
+#数组拼接为字符串
+list_1=''.join(str(i) for i in list_1)  #list1=“”是不带空格的
+print(list_1)
+
+#切片的方式取出第三到第八个字符
+list_2=list_1[2:8]         #空格也算字符
+print(list_2)
+
+#将获得字符串进行翻转
+list_3=list_2[::-1]
+print(list_3)
+
+#将结果转换为INT类型
+int_1=int(list_3)
+print(int_1)
+
+#分别转换为二进制，八进制，十六进制
+print('转换成二进制为:',bin(int_1))
+print('转换成八进制为:',oct(int_1))
+print('转换成十六进制为:',hex(int_1))

exercises/1901010060/1001S02E05_stats_text.py

@@ -0,0 +1,38 @@
+text = '''
+The Zen of Python, by Tim Peters
+Beautiful is better than ugly.
+Explicit is better than implicit.
+Simple is better than complex.
+Complex is better than complicated.
+Flat is better than nested.
+Sparse is better than dense.
+Readability counts.
+Special cases aren't special enough to break the rules.
+Although practicality beats purity.
+Errors should never pass silently.
+Unless explicitly silenced.
+In the face of ambxiguity, refuse the temptation to guess.
+There should be one-- and preferably only one --obvious way to do it.
+Although that way may not be obvious at first unless you're Dutch.
+Now is better than never.
+Although never is often better than *right* now.
+If the implementation is hard to explain, it's a bad idea.
+If the implementation is easy to explain, it may be a good idea.
+Namespaces are one honking great idea -- let's do more of those!
+'''
+
+text=text.replace(',','').replace('.','').replace('--','').replace('!','').replace('*','')  #去除标点符号（没有找到更好的办法，如果文本格式很多怎么办？）
+text=text.lower()   #把单词全部变为小写
+text=text.split()   #把字符串分割成单个单词列表
+
+dict={}
+for x in text:
+    if x in dict:
+        dict[x]=dict[x]+1
+    else:
+        dict[x]=1
+text_1 = sorted(dict.items(), key=lambda y: y[1], reverse=True)   #key为排序依据，y【0】为key，1为y，这里不太懂，reverse为true时降序。
+
+print(text_1)
+
+

exercises/1901010060/1001S02E05_string.py

@@ -0,0 +1,41 @@
+text = '''
+The Zen of Python, by Tim Peters
+Beautiful is better than ugly.
+Explicit is better than implicit.
+Simple is better than complex.
+Complex is better than complicated.
+Flat is better than nested.
+Sparse is better than dense.
+Readability counts.
+Special cases aren't special enough to break the rules.
+Although practicality beats purity.
+Errors should never pass silently.
+Unless explicitly silenced.
+In the face of ambxiguity, refuse the temptation to guess.
+There should be one-- and preferably only one --obvious way to do it.
+Although that way may not be obvious at first unless you're Dutch.
+Now is better than never.
+Although never is often better than *right* now.
+If the implementation is hard to explain, it's a bad idea.
+If the implementation is easy to explain, it may be a good idea.
+Namespaces are one honking great idea -- let's do more of those!
+'''
+
+
+text1 = text.replace("better","worse")
+text2 =text1.split(" ")
+d=[]
+for i in text2:
+    if 'ea' not in i:
+        d.append(i)
+    else:
+        continue        
+e=' '
+f=e.join(d)
+g = f.swapcase()
+h = g.split()
+j = sorted(h)
+k = ' '
+l = k.join(j)
+print(l)
+