Python3 Base string swapcase English letter lowercase to uppercase and uppercase to lowercase

Town Field Poem:
Cheng listens to the Tathagata language, the world name and benefit of Dayton. Be willing to do the Tibetan apostles, the broad show is by Sanfu mention.
I would like to do what I learned, to achieve a conscience blog. May all the Yimeimei, reproduce the wisdom of the body.
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Code

mystr= ' Hello World ' #大写变小写 and lowercase to uppercase mynewstr=mystr.swapcase () print (mystr) print (MYNEWSTR)

Result

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The essence of the blog, in the technical part, more in the town yard a poem. Python version 3.5, System Windows7.
Python is a good language and deserves to be studied hard. I am following the small Turtle Video tutorial to learn, recommended.
I am a novice, so if the content of the blog can be improved, or even the wrong place, please leave a comment, I will try to correct, strive to achieve a conscience blog.
Note: This article is only as a scientific research study, if I inadvertently violated your rights and interests, please be sure to timely inform, I will make corrections.

Python3 Base string swapcase English letter lowercase to uppercase and uppercase to lowercase