Shulou(Shulou.com)06/02 Report--

In this issue, the editor will bring you two practical skills about Python. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

one。 I remember that when we first started work, the boss gave us a basic course on C++ and told us that the literal amount of strings could be wrapped (the following code). It felt like a dream.

# include int main (int argc, char** argv) {char* w = "hello"world."; printf ("% s", w); return 0;}

Output:

Hello world.

Later, after writing Python for a long time, I realized that Python can also be:

> t = ('hello'...' '... 'world') > t' hello world'

This feature is useful to gracefully divide ultra-long code into lines. I remember that in the past, when spelling the SQL language and writing log entries, I always struggled with the length of more than 78 lines of code (see our programming specification: http://blog.csdn.net/lanphaday/article/details/6601123), there is no pressure now.

two。 When writing the test code for absolute32 (see: http://blog.csdn.net/lanphaday/article/details/6762023)), in order to make the test code compatible with the two major versions of Python2.x/3.x, a weight of ugly code was introduced:

If sys.version

< '3': exec("chinese = unicode('赖勇浩', 'utf-8')") else: exec("chinese = '赖勇浩'") 这是因为在 Python2.x 中 chinese = '赖勇浩' 的编码不是 unicode 的，而在 Python3.x 中取消了字符串字面量的前缀 u，所以 chinese = u'赖勇浩' 又直接语法错误，当时只好写下了 exec 的代码根据不同的版本来进行编译。后来才知道 Python2.6 中引入了 unicode_literals，可以很方便地写 2.x/3.x 兼容的代码： >

> x = 'China' > > x'\ xe4\ xb8\ xad\ xe5\ x9b\ xbd' > from _ future__ import unicode_literals > y = 'China' > y u'\ u4e2d\ u56fd'

In this way, my ugly code can also be beautified!

These are the two practical cold skills of Python shared by the editor. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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