我正在使用 python 计算如果每 7 秒有一个孩子出生，那么 5 年内会有多少个孩子出生。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"
打印时用于,分隔字符串和变量：
,
print("If there was a birth every 7 seconds, there would be: ", births, "births")
,in print 函数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
