如何在 Python 的同一行上打印变量和字符串？

Question

我正在使用 python 计算如果每 7 秒有一个孩子出生，5 年内将出生多少个孩子。问题出在我的最后一行。当我在它的任一侧打印文本时，如何让变量工作？

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"

原文由 Bob Uni 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

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")

, 在打印功能中用一个空格分隔项目：

 >>> 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，还允许您执行一些其他操作，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

原文由 Ashwini Chaudhary 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 2

Python 是一种用途广泛的语言。您可以通过不同的方法打印变量。我在下面列出了五种方法。您可以根据自己的方便使用它们。

例子：

 a = 1
b = 'ball'

方法一：

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

方法二：

 print('I have', a, b)

方法三：

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

方法四：

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

方法五：

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

输出将是：

 I have 1 ball

原文由 Gagan Agrawal 发布，翻译遵循 CC BY-SA 4.0 许可协议