1.print
>>> print ‘hello world‘
SyntaxError: Missing parentheses in call to ‘print‘
>>>
Python版本更新后,3.X的版本中去掉了很多的函数,在3.X版本的python中,print需要加上括号
如:
>>> print (‘hello world‘)
hello world
>>>
另:将数据输出为一组时,python2.x直接在需要输出数据后面加上“,”即可,但python3.x中使用此方法无效,应该使用如下代码:
>>> print (item, end=" ")
2.input
>>> myName=raw_input(‘Ener your name:‘)
Traceback (most recent call last):
File "<pyshell#129>", line 1, in <module>
myName=raw_input(‘Ener your name:‘)
NameError: name ‘raw_input‘ is not defined
>>>
同1,因版本问题。可直接用input代替
如:
>>> myName=input(‘Ener your name:‘)
Ener your name:cookie
>>>
3.decimal
>>> print (decimal.Decimal(‘1.1‘))
Traceback (most recent call last):
File "C:/Users/cookie/Desktop/bb.py", line 2, in <module>
print (decimal.Decimal(‘1.1‘))
NameError: name ‘decimal‘ is not defined
>>>
错误提示‘decimal’ 未定义,导入decimal包即可
如:
>>> import decimal
>>> print (decimal.Decimal(‘1.1‘))
1.1
>>>