Today small for everyone to share user input and the output of an python3.4 control method, a good reference value, we want to help. Come and see, to follow the small series together
a input
1. Function Format: input ()
2. Function: accepts a standard input data, return a string type. ctrl + z input end.
3. Example:
默认input（）：等待一个任意字符的输入
str=input（‘input a string:\n'）:接受输入数据作为string类型传给str，\n为提示信息换行。
4. Accept a plurality of data inputs using eval () function, the interval must be a comma character
>>> lines
['', '', '', '84', '2', '3', '']
>>> a,b,c=eval(input())
1,2,3
>>> a
1
>>> c
3
5. A method of receiving a multi-line input
>>> sen='end' #作为结束符
>>> list2=[]
>>> for line in iter(input,ends):
line1=line.split(',')
list2.append(line1)
23,34
25,78
end
>>> list2
[['23', '34'], ['25', '78']]
Second, the output
1. Function Format: print ([object, ...], sep = '', end = '\ n', file = sys.stdout) (end Enter the default value, can be custom symbol)
2. Examples
print (): outputs a blank line
Formatted output
#% X - hex hex
#% D - dec Decimal
#% O - oct octal
#% S - string
#% f - float float
Example 1:
>>> str1='the value is'
>>> num1=11
>>> print('%s%d'%(str1,num1))
the value is11
Example 2:
PI=3.1415926
print("PI = %10.3f" % math.pi) #输出PI = 3.142
print("PI = %-10.3f" % math.pi) #输出PI = 3.142
Example 3:
print("%.3s" %("abcde")) #输出abc
print("%.*s" %(4,"abcde")) #输出abcd
print("%10.3s" %("abcde")) #输出 abc(总长度为10，字符长度不够前面填空格)
Example 4: printing a plurality of rows
print(""" 你的内容 """) 或者 print(''' 你的内容 ''')
Example 5: print plain text, without the use of escape characters: print (r 'content') or print (R 'content')
print(r'abc\n') #直接打印字符串abc\n
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