第一节
1 练习:使用Python来输出这句话"Welcome to the English to Pig Latin translator!"
print "Welcome to the English to Pig Latin translator!"
第二节
1 介绍了Python的输入,Python里面我们可以通过raw_input来实现出入
2 比如我们使用name = raw_ijnput("what's your name") , 那么这里将会在what's your name提示我们输入,并把结果保存到name里面
3 练习:使用original变量来接受任何的输入
print "Welcome to the English to Pig Latin translator!" original = raw_input("welcome to the Python:")
第三节
1 介绍了我们在输入的时候经常出现输入空字符串的情况,因此我们需要去检查是否是空字符串
2 练习:在上一节的输入的值进行判断,如果不是空字符串那么打印这个值,否则直接输出"empty"
print "Welcome to the English to Pig Latin translator!" original = raw_input("welcome to the Python:") if len(original) > 0: print original else: print "empty"
第四节
1 介绍了怎样判断一个字符串是数字的方法,我们可以通过isalpha()来判断
2 比如有一个变量为x = "123",那么x.isalpha()是True
3 练习:通过变量original的输入值来判断是否是一个数字串
print "Welcome to the English to Pig Latin translator!" original = raw_input("welcome to the Python:") if original.isalpha(): print "True" else: print "False"
第五节
1 练习:利用多次的输入来判断是否是数字串和非空字符串
print "Welcome to the English to Pig Latin translator!" original = raw_input("welcome to the Python:") if original.isalpha(): print "True" else: print "False" original = raw_input("welcome to the Python:") if len(y) == 0: print "empty" else: print "no empty"
第六节
1 回顾了一下之前的String的lower()函数
2 练习
1 设置变量word等于original.lower()
2 设置变量first等于word的第一个字符
pyg = 'ay' original = raw_input('Enter a word:') word = original.lower() first = word[0] if len(original) > 0 and original.isalpha(): print original else: print 'empty'
第六节
1 介绍了if语句里面还可以嵌套语句
2 练习:判断上一节里面的first字符是否是元音字符是的话输出"vowel",否则输出"consonant"
pyg = 'ay' original = raw_input('Enter a word:') word = original.lower() first = word[0] if len(original) > 0 and original.isalpha(): if first == 'a' or first == 'i' or first == 'o' or first == 'u' or first == 'e': print "vowel" else: print "consonant" else: print 'empty'
第七节
1 利用String的+操作,产生一个新的变量new_word等于word+pyg
2 练习:把print "vowel"替换成print new_word
pyg = 'ay' original = raw_input('Enter a word:') word = original.lower() first = word[0] new_word = word+pyg if len(original) > 0 and original.isalpha(): if first == 'a' or first == 'i' or first == 'o' or first == 'u' or first == 'e': print new_word else: print "consonant" else: print 'empty'
第八节
1 介绍了String中得到子串的方法,比如我们有一个字符串s = "foo",现在s[0:2]就是"fo"
2 如果结束是末尾,那么可以直接写成这样s[i:],省略第二个数
2 练习:在嵌套的if语句里面设置new_word的值为word从第1位到最后一位+变量pyg
pyg = 'ay' original = raw_input('Enter a word:') word = original.lower() first = word[0] new_word = word+pyg if len(original) > 0 and original.isalpha(): if first == 'a' or first == 'i' or first == 'o' or first == 'u' or first == 'e': new_word = word[1:]+pyg print new_word else: print "consonant" else: print 'empty'