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
我将您的脚本复制并粘贴到一个.py文件中。我用Python 2.7.10运行它，并收到相同的语法错误。我还在Python 3.5中尝试了脚本，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'
然后，我修改了打印出生数的最后一行:
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"
输出是(Python 2.7.10):
157680000
If there was a birth every 7 seconds, there would be: 22525714 births
我希望这能有所帮助。
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)
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
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
print('If there was a birth every 7 seconds, there would be: %d births' %(births))
# Will replace %d with births
从Python-3.8开始，你可以使用带有变量名打印的f-string !
age = 19
vitality = 17
charisma = 16
name = "Alice"
print(f"{name=}, {age=}, {vitality=}, {charisma=}")
# name='Alice', age=19, vitality=17, charisma=16
命名错误在这里几乎是不可能的!如果您添加、重命名或删除一个变量，您的调试打印将保持正确 调试行非常简洁 不要担心对齐。第四个论点是魅力还是活力?好吧，你不在乎，不管它是正确的。
在中间用，(逗号)就可以了。
为了更好地理解，请参阅下面的代码:
# Weight converter pounds to kg
weight_lbs = input("Enter your weight in pounds: ")
weight_kg = 0.45 * int(weight_lbs)
print("You are ", weight_kg, " kg")
