如何在Python的同一行上打印变量和字符串？

Question

我正在使用python算出如果一个孩子每7秒出生一次，那么5年内将有多少个孩子出生。问题出在我的最后一行。当我在文本的任何一侧打印文本时，如何使它工作？这是我的代码：currentPop = 312032486oneYear = 365hours = 24minutes = 60seconds = 60# seconds in a single daysecondsInDay = hours * minutes * seconds# seconds in a yearsecondsInYear = secondsInDay * oneYearfiveYears = secondsInYear * 5#Seconds in 5 yearsprint fiveYears# fiveYears in seconds, divided by 7 secondsbirths = fiveYears // 7print "If there was a birth every 7 seconds, there would be: " births "births"

Answer 1

使用,分隔字符串和变量，同时打印：

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

, in print功能将项目分隔为一个空格：

>>> print("foo", "bar", "spam")

foo bar spam

或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))

字符串格式化功能更强大，它还允许您执行其他操作，例如填充，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

Answer 2

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。我列出了以下五种方法。您可以根据需要使用它们。

例子：

a = 1b = 'ball'

方法1：

print('I have %d %s' % (a, b))

方法2：

print('I have', a, b)

方法3：

print('I have {} {}'.format(a, b))

方法4：

print('I have ' + str(a) + ' ' + b)

方法5：

print(f'I have {a} {b}')

输出为：

I have 1 ball

Answer 3

还有两个

第一个

>>> births = str(5)

>>> print("there are " + births + " births.")

there are 5 births.

添加字符串时，它们会串联在一起。

第二个

同样format，字符串的（Python 2.6和更高版本）方法可能是标准方法：

>>> births = str(5)

>>>

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

there are 5 births.

此format方法也可以与列表一起使用

>>> 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