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
Python是一种非常通用的语言。你可以用不同的方法打印变量。我列出了以下五种方法。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}')
输出将是:
I have 1 ball
略有不同:使用Python 3并在同一行中打印几个变量:
print("~~Create new DB:",argv[5],"; with user:",argv[3],"; and Password:",argv[4]," ~~")
在当前的python版本中，您必须使用括号，如下所示:
print ("If there was a birth every 7 seconds", X)
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)
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")
