我用python计算出如果每7秒出生一个孩子5年内会有多少个孩子出生。问题在我的最后一行。我如何得到一个变量的工作时，我打印文本的任何一方?
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"
当前回答
在打印时使用，分隔字符串和变量:
print("If there was a birth every 7 seconds, there would be: ", births, "births")
，打印功能用一个空格分隔项目:
>>> print("foo", "bar", "spam")
foo bar spam
或者更好的使用字符串格式:
print("If there was a birth every 7 seconds, there would be: {} births".format(births))
字符串格式是更强大的，并允许你做一些其他的事情，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
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
其他回答
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))
你首先要创建一个变量:例如:D = 1。然后这样做，但替换字符串与任何你想要:
D = 1
print("Here is a number!:",D)
PYTHON 3
最好使用格式选项
user_name=input("Enter your name : )
points = 10
print ("Hello, {} your point is {} : ".format(user_name,points)
或将输入声明为字符串并使用
user_name=str(input("Enter your name : ))
points = 10
print("Hello, "+user_name+" your point is " +str(points))
你可以使用字符串格式化来做到这一点:
print "If there was a birth every 7 seconds, there would be: %d births" % births
或者你可以给print多个参数，它会自动用一个空格分隔它们:
print "If there was a birth every 7 seconds, there would be:", births, "births"
两个
第一个
>>> births = str(5)
>>> print("there are " + births + " births.")
there are 5 births.
当添加字符串时，它们连接在一起。
第二个
此外，字符串的format (Python 2.6及更新版本)方法可能是标准方式:
>>> births = str(5)
>>>
>>> print("there are {} births.".format(births))
there are 5 births.
这种格式方法也可以用于列表
>>> format_list = ['five', 'three']
>>> # * unpacks the list:
>>> print("there are {} births and {} deaths".format(*format_list))
there are five births and three deaths
或字典
>>> format_dictionary = {'births': 'five', 'deaths': 'three'}
>>> # ** unpacks the dictionary
>>> print("there are {births} births, and {deaths} deaths".format(**format_dictionary))
there are five births, and three deaths
编辑:
它是2022年，python3现在有f字符串。
>>> x = 15
>>> f"there are {x} births"
'there are 15 births'
