Python 入门教程 6 ---- PygLatin
1 练习：使用python来输出这句话"Welcome to the English to Pig Latin translator!"
[python]
print "Welcome to the English to Pig Latin translator!"
41 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
[python]
print "Welcome to the English to Pig Latin translator!"
original = raw_input("welcome to the Python:")
42 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"
[python]
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"
43 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
如果是阿拉伯数字，则isalpha的值为false ，否则为TRUE
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
[python]
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
[python]
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
[python]
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"
[python]
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
[python]
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'
44 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"
45 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
[python]
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'