Using If-else in the Python list derivation

When dealing with automated mail data today, when data rows contain strings, the integer data obtained from hive is automatically converted into floating-point numbers, which can seriously affect aesthetics. Therefore, the idea is to use a list derivation to do the conversion, the digital data in all of the conversion to Integer, and the character data is left intact.

There are a total of two forms of the list deduction:

①[x for x in data if condition]

Here if the main function of the conditional judgment, the data only satisfies if conditions will be left, and finally unified into a data list

②[EXP1 if condition else EXP2 for x in data]

Here If...else is the main function of assignment, when the data in the value of the IF condition to do exp1 processing, otherwise, according to EXP2 processing, finally unified into a data list

Examples are as follows:

data = [' Driver ', ' 2017-07-13 ', 1827.0, 2058.0, 978.0, 1636.0, 1863.0, 2537.0, 1061.0]

(1) If I want to obtain a value greater than 2000 in the above list, this can be ① in the form of a list deduction:

[x for x in data if x > 2000]

The results are as follows (the string type data is considered an infinite number):

[' Driver ', ' 2017-07-13 ', 2058.0, 2537.0]

(2) To resolve the problem I mentioned above, you need to use the form of a list deduction ②

[Int (x) if type (x) = = Float else x for x in data]

Get results:

[' Driver ', ' 2017-07-13 ', 1827, 2058, 978, 1636, 1863, 2537, 1061]

This article is from the "Abe" blog, so be sure to keep this source http://abezoo.blog.51cto.com/7223683/1947675

Using If-else in the Python list derivation