如何在 Python 的同一行上打印变量和字符串？

How can I print variable and string on same line in Python?

提问by Bob Uni

I am using python to work out how many children would be born in 5 years if a child was born every 7 seconds. The problem is on my last line. How do I get a variable to work when I'm printing text either side of it?

我正在使用 python 计算如果每 7 秒就有一个孩子出生，那么 5 年内会出生多少个孩子。问题出在我的最后一行。当我在变量的任一侧打印文本时，如何让变量起作用？

Here is my code:

这是我的代码：

currentPop = 312032486
oneYear = 365
hours = 24
minutes = 60
seconds = 60

# seconds in a single day
secondsInDay = hours * minutes * seconds

# seconds in a year
secondsInYear = secondsInDay * oneYear

fiveYears = secondsInYear * 5

#Seconds in 5 years
print fiveYears

# fiveYears in seconds, divided by 7 seconds
births = fiveYears // 7

print "If there was a birth every 7 seconds, there would be: " births "births"

采纳答案by Ashwini Chaudhary

Use ,to separate strings and variables while printing:

用于,在打印时分隔字符串和变量：

print "If there was a birth every 7 seconds, there would be: ",births,"births"

,in print statement separtes the items by a single space:

,在打印语句中用一个空格分隔项目：

>>> print "foo","bar","spam"
foo bar spam

or better use string formatting:

或者更好地使用字符串格式：

print "If there was a birth every 7 seconds, there would be: {} births".format(births)

String formatting is much more powerful and allows you to do some other things as well, like : padding, fill, alignment,width, set precision etc

字符串格式更强大，还允许你做一些其他的事情，比如：填充、填充、对齐、宽度、设置精度等

>>> print "{:d} {:03d} {:>20f}".format(1,2,1.1)
1 002             1.100000
  ^^^
  0's padded to 2

Demo:

演示：

>>> births = 4
>>> print "If there was a birth every 7 seconds, there would be: ",births,"births"
If there was a birth every 7 seconds, there would be:  4 births

#formatting
>>> print "If there was a birth every 7 seconds, there would be: {} births".format(births)
If there was a birth every 7 seconds, there would be: 4 births

回答by Amber

You can use string formattingto do this:

您可以使用字符串格式来执行此操作：

print "If there was a birth every 7 seconds, there would be: %d births" % births

or you can give printmultiple arguments, and it will automatically separate them by a space:

或者你可以给出print多个参数，它会自动用空格分隔它们：

print "If there was a birth every 7 seconds, there would be:", births, "births"

回答by enpenax

You can either use a formatstring:

您可以使用格式字符串：

print "There are %d births" % (births,)

or in this simple case:

或者在这个简单的情况下：

print "There are ", births, "births"

回答by TehTris

two more

还有两个

The First one

第一个

 >>>births = str(5)
 >>>print "there are " + births + " births."
 there are 5 births.

When adding strings, they concatenate.

添加字符串时，它们会连接起来。

The Second One

第二个

Also the format(Python 2.6 and newer) method of strings is probably the standard way:

此外format，字符串的（Python 2.6 和更新版本）方法可能是标准方法：

>>> births = str(5)
>>>
>>> print "there are {} births.".format(births)
there are 5 births.

This formatmethod can be used with lists as well

此format方法也可用于列表

>>> format_list = ['five','three']
>>> print "there are {} births and {} deaths".format(*format_list) #unpack the list
there are five births and three deaths

or dictionaries

或字典

>>> format_dictionary = {'births': 'five', 'deaths': 'three'}
>>> print "there are {births} births, and {deaths} deaths".format(**format_dictionary) #yup, unpack the dictionary
there are five births, and three deaths

回答by Debug255

I copied and pasted your script into a .py file. I ran it as-is with Python 2.7.10 and received the same syntax error. I also tried the script in Python 3.5 and received the following output:

我将您的脚本复制并粘贴到 .py 文件中。我使用 Python 2.7.10 按原样运行它并收到相同的语法错误。我还尝试了 Python 3.5 中的脚本并收到以下输出：

File "print_strings_on_same_line.py", line 16
print fiveYears
              ^
SyntaxError: Missing parentheses in call to 'print'

Then, I modified the last line where it prints the number of births as follows:

然后，我修改了打印出生人数的最后一行，如下所示：

currentPop = 312032486
oneYear = 365
hours = 24
minutes = 60
seconds = 60

# seconds in a single day
secondsInDay = hours * minutes * seconds

# seconds in a year
secondsInYear = secondsInDay * oneYear

fiveYears = secondsInYear * 5

#Seconds in 5 years
print fiveYears

# fiveYears in seconds, divided by 7 seconds
births = fiveYears // 7

print "If there was a birth every 7 seconds, there would be: " + str(births) + " births"

The output was (Python 2.7.10):

输出是（Python 2.7.10）：

157680000
If there was a birth every 7 seconds, there would be: 22525714 births

I hope this helps.

我希望这有帮助。

回答by Dror

On a current python version you have to use parenthesis, like so :

在当前的 python 版本上，您必须使用括号，如下所示：

print ("If there was a birth every 7 seconds", X)

回答by Python Coding Trainer

If you want to work with python 3, it's very simple:

如果你想使用 python 3，这很简单：

print("If there was a birth every 7 second, there would be %d births." % (births))

回答by Pythonbites Programming

You would first make a variable: for example: D = 1. Then Do This but replace the string with whatever you want:

您将首先创建一个变量：例如：D = 1。然后执行此操作，但将字符串替换为您想要的任何内容：

D = 1
print("Here is a number!:",D)

回答by Gagan Agrawal

Python is a very versatile language. You may print variables by different methods. I have listed below 4 methods. You may use them according to your convenience.

Python 是一种非常通用的语言。您可以通过不同的方法打印变量。我在下面列出了4种方法。您可以根据自己的方便使用它们。

Example:

例子：

a=1
b='ball'

Method 1:

方法一：

print('I have %d %s' %(a,b))

Method 2:

方法二：

print('I have',a,b)

Method 3:

方法三：

print('I have {} {}'.format(a,b))

Method 4:

方法四：

print('I have ' + str(a) +' ' +b)

Method 5:

方法五：

  print( f'I have {a} {b}')

Output would be:

输出将是：

I have 1 ball

回答by Siddharth Dash

use String formatting

使用字符串格式

print("If there was a birth every 7 seconds, there would be: {} births".format(births))
 # Will replace "{}" with births

if you doing a toy project use:

如果你做一个玩具项目使用：

print('If there was a birth every 7 seconds, there would be:' births'births) 

or

或者

print('If there was a birth every 7 seconds, there would be: %d births' %(births))
# Will replace %d with births