在Python中如何在同一行上打印变量和字符串？

我正在使用python计算如果一个孩子每7秒出生一次，5年内会有多少个孩子出生。问题在我的最后一行。当我将文本打印到变量的任一侧时，如何使变量工作

这是我的密码：

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，通过单个空格分隔项目：

>>> print("foo", "bar", "spam")
foo bar spam

或更好地使用：

字符串格式功能更强大，还允许您执行其他操作，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：

您可以使用来执行此操作：

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

或者您可以给

print

多个参数，它会自动用空格分隔它们：

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

---

您可以使用格式字符串：

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

或者在这个简单的例子中：

print "There are ", births, "births"

再来两个

第一个

>>> births = str(5)
>>> print("there are " + births + " births.")
there are 5 births.

添加字符串时，它们会连接在一起

第二个

>>> births = str(5)
>>> print("there are " + births + " births.")
there are 5 births.

另外，字符串的

格式

（Python 2.6及更新版本）方法可能是标准方法：

>>> births = str(5)
>>>
>>> print("there are {} births.".format(births))
there are 5 births.

此

格式

方法也可用于列表

>>> format_list = ['five', 'three']
>>> # * unpacks the list:
>>> print("there are {} births and {} deaths".format(*format_list))  
there are five births and three deaths

或字典

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

---

我将您的脚本复制并粘贴到.py文件中。我在Python2.7.10中按原样运行，收到了相同的语法错误。我还尝试了Python 3.5中的脚本，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，其中打印出生数，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）：

---

我希望这会有所帮助。

在当前的python版本中，必须使用括号，如下所示：

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

---

如果您想使用python 3，它非常简单：

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

---

首先创建一个变量：例如：D=1。然后执行此操作，但将字符串替换为所需的内容：

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

---

Python是一种非常通用的语言。您可以使用不同的方法打印变量。我列举了以下五种方法。你可以根据自己的方便使用它们

示例：

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}')

产出将是：

我有一个球

使用

如果您正在进行玩具项目，请使用：

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

或

---

从Python3.6开始，您可以使用

---

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]," ~~")

---

您可以使用f-string或.format（）方法

使用f字串

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

使用.format（）

---

如果您使用的是python 3.6或最新版本， f-string是最好、最简单的一款

print(f"{your_varaible_name}")

---

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)

或者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))

在两者之间使用（逗号）

请参阅此代码以更好地理解：

# 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")

---

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"

使用字符串格式：

birth = 5.25487
print(f'''
{birth} 
''')

---

谢谢你的回答，琥珀。你能解释一下%符号后面的“d”是什么吗？谢谢

%d

表示“将值格式化为整数”。类似地，

%s

将是“将值格式化为字符串”，而

%f

将是“将值格式化为浮点数”。我在回答中链接到的Python手册部分中记录了这些和更多内容。但是，如果使用第二种方法，请小心，因为这是一个元组，而不是字符串。字符串

“输入您的名称：

忽略右引号

打印（“您好，{}您的点是{}:”.format（用户名，点）

缺少右括号。决定与您的编程风格有关：M2是程序编程，M3是面向对象编程。M5的关键字是。如果需要，应使用M1和M4之类的字符串操作，这里不是这种情况（M1代表字典和元组；M4代表ascii艺术和其他格式化输出）2020年要小心（常识，我知道：D）。打印已经成为Python3中的一个功能，现在需要用括号括起来：

Print（something）

（Python2今年已经过时了）。这并不能回答这个问题。一旦你有足够的数据，你就能够；相反-

print(f"{your_varaible_name}")

user_name=input("Enter your name : )

points = 10

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

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

points = 10

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

# 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")

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

birth = 5.25487
print(f'''
{birth} 
''')