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 = 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"

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"

, 在print语句中将项目分隔一个空格：

>>> 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)

字符串格式化功能强大得多，它还允许您执行其他一些操作，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

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']
>>> print "there are {} births and {} deaths".format(*format_list) #unpack the list
there are five births and three deaths

或字典

>>> format_dictionary = {'births': 'five', 'deaths': 'three'}
>>> print "there are {births} births, and {deaths} deaths".format(**format_dictionary) #yup, unpack the dictionary
there are five births, and three deaths

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4种方法。您可以根据需要使用它们。

例：

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}')

输出为：

I have 1 ball

如果要使用python 3，它非常简单：

print("If there was a birth every 7 second, there would be %d births." % (births))

从python 3.6开始，您可以使用文字字符串插值。

births = 5.25487
>>> print(f'If there was a birth every 7 seconds, there would be: {births:.2f} births')
If there was a birth every 7 seconds, there would be: 5.25 births

您可以使用f-string或.format（）方法

使用f弦

print(f'If there was a birth every 7 seconds, there would be: {births} births')

使用.format（）

print("If there was a birth every 7 seconds, there would be: {births} births".format(births=births))

您可以使用格式字符串：

print "There are %d births" % (births,)

或在这种简单情况下：

print "There are ", births, "births"

如果您使用的是python 3.6或最新版本，则f-string是最佳和简便的选择

print(f"{your_varaible_name}")

您将首先创建一个变量：例如：D =1。然后执行此操作，但是将字符串替换为所需的任何内容：

D = 1
print("Here is a number!:",D)

在当前的python版本上，您必须使用括号，如下所示：

print ("If there was a birth every 7 seconds", X)

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

如果您在进行玩具项目，请使用：

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

要么

print('If there was a birth every 7 seconds, there would be: %d births' %(births))
# Will replace %d with births

您可以使用字符串格式来执行此操作：

print "If there was a birth every 7 seconds, there would be: %d births" % births

或者您可以提供print多个参数，它将自动用空格分隔它们：

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

我将您的脚本复制并粘贴到.py文件中。我使用Python 2.7.10原样运行它，并收到了相同的语法错误。我还在Python 3.5中尝试了该脚本，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，我修改了最后一行，其中打印了出生人数，如下所示：

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"

输出为（Python 2.7.10）：

157680000
If there was a birth every 7 seconds, there would be: 22525714 births

我希望这有帮助。

只需在之间使用，（逗号）。

请参阅以下代码以获得更好的理解：

# 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")

稍有不同：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]," ~~")

PYTHON 3

最好使用格式选项

user_name=input("Enter your name : )

points = 10

print ("Hello, {} your point is {} : ".format(user_name,points)

或将输入声明为字符串并使用

user_name=str(input("Enter your name : ))

points = 10

print("Hello, "+user_name+" your point is " +str(points))

如果在字符串和变量之间使用逗号，如下所示：

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