两个

第一个

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

当添加字符串时，它们连接在一起。

第二个

此外，字符串的format (Python 2.6及更新版本)方法可能是标准方式:

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

这种格式方法也可以用于列表

>>> 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

编辑:

它是2022年，python3现在有f字符串。

>>> x = 15
>>> f"there are {x} births"
'there are 15 births'

你可以使用格式化字符串:

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

或者在这个简单的例子中:

print "There are ", births, "births"

你可以使用字符串格式化来做到这一点:

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

或者你可以给print多个参数，它会自动用一个空格分隔它们:

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

如果你在字符串和变量之间使用逗号，就像这样:

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。