•        Python : 3.7.3
•          OS : Ubuntu 18.04.2 LTS
•         IDE : pycharm-community-2019.1.3
•       Conda : 4.7.5
•    typesetting : Markdown

 

code

"""

@Author : 行初心

@Date   : 2019/7/2

@Blog   : www.cnblogs.com/xingchuxin

@Gitee  : gitee.com/zhichengjiu

"""

def main():

    book_name = "本草纲目"

    book_quantity = 1

    book_price = 39.1266

    print("""

    书名:%s

    数量:%d

    单价:%f

    """ % (book_name, book_quantity, book_price))

    # 保留三位小数

    print("%.3f" % book_price)

    # 整数的位数不够，在左侧用0来凑。位数够的话，没有影响。

    print("%04d" % book_quantity)

if __name__ == '__main__':

    main()

 

result

/home/coder/anaconda3/envs/py37/bin/python /home/coder/PycharmProjects/Base/demo.py

    书名:本草纲目

    数量:1

    单价:39.126600

39.127

0001

Process finished with exit code 0

 

source_code

def print(self, *args, sep=' ', end='\n', file=None): # known special case of print

    """

    print(value, ..., sep=' ', end='\n', file=sys.stdout, flush=False)

    Prints the values to a stream, or to sys.stdout by default.

    Optional keyword arguments:

    file:  a file-like object (stream); defaults to the current sys.stdout.

    sep:   string inserted between values, default a space.

    end:   string appended after the last value, default a newline.

    flush: whether to forcibly flush the stream.

    """

    pass

 

resource

• [文档 - English] docs.python.org/3
• [文档 - 中文] docs.python.org/zh-cn/3
• [规范] www.python.org/dev/peps/pep-0008
• [规范] zh-google-styleguide.readthedocs.io/en/latest/google-python-styleguide/python_language_rules
• [源码] www.python.org/downloads/source
• [ PEP ] www.python.org/dev/peps
• [平台] www.cnblogs.com
• [平台] gitee.com

 

---

Python具有开源、跨平台、解释型、交互式等特性，值得学习。

Python的设计哲学：优雅，明确，简单。提倡用一种方法，最好是只有一种方法来做一件事。

代码的书写要遵守规范，这样有助于沟通和理解。

每种语言都有独特的思想，初学者需要转变思维、踏实践行、坚持积累。