Apple Early series Archives

Floor or ceiling of a pandas series in python?

January 11, 2021 Andrew Rocky

Question or problem about Python programming: I have a pandas series series. If I want to get the element-wise floor or ceiling, is there a built in method or do I have to write the function and use apply? I ask because the data is big so I appreciate efficiency. Also this question has not […]

Elegant way to remove items from sequence in Python?

January 3, 2021 Abreonia Ng

Question or problem about Python programming: When I am writing code in Python, I often need to remove items from a list or other sequence type based on some criteria. I haven’t found a solution that is elegant and efficient, as removing items from a list you are currently iterating through is bad. For example, […]

Python is a powerful general-purpose programming language.

Finding the intersection between two series in Pandas

January 2, 2021 James Cameron

Question or problem about Python programming: I have two series s1 and s2 in pandas and want to compute the intersection i.e. where all of the values of the series are common.

How to group a Series by values in pandas?

December 21, 2020 Oceane Wilson

Question or problem about Python programming: I currently have a pandas Series with dtype Timestamp, and I want to group it by date (and have many rows with different times in each group).

Python: Pandas Series – Why use loc?

December 17, 2020 James Cameron

Question or problem about Python programming: Why do we use ‘loc’ for pandas dataframes? it seems the following code with or without using loc both compile anr run at a simulular speed

Functions Defined The core of extensible programming is defining functions. Python allows mandatory and optional arguments, keyword arguments, and even arbitrary argument lists.

Get first element of Series without knowing the index

December 17, 2020 Jeffrey Schneider

Question or problem about Python programming: Is that any way that I can get first element of Seires without have information on index. For example,We have a Series import pandas as pd key=’MCS096′ SUBJECTS=pd.DataFrame({‘ID’:Series([146],index=[145]),\ ‘study’:Series([‘MCS’],index=[145]),\ ‘center’:Series([‘Mag’],index=[145]),\ ‘initials’:Series([‘MCS096’],index=[145]) }) prints out SUBJECTS: print (SUBJECTS[SUBJECTS.initials==key][‘ID’]) 145 146 Name: ID, dtype: int64 How can I get the value […]

Pandas: change data type of Series to String

December 12, 2020 Odhran Miss

Question or problem about Python programming: I use Pandas ‘ver 0.12.0’ with Python 2.7 and have a dataframe as below:

Extract values in Pandas value_counts()

December 11, 2020 Bell Jacquise

Question or problem about Python programming: Say we have used pandas dataframe[column].value_counts() which outputs:

Static library built for archive which is not the architecture being linked (x86_64)

December 6, 2020 Andrew Rocky

Question or issue on macOS: I am experiencing what seems to be the same problem when I try to compile two different programs. Each of them creates first a static library and then the main application linking that library. I am working on Mac OS Mavericks with gcc 4.7.2.

Remove NaN from pandas series

December 6, 2020 Ollie MC

Question or problem about Python programming: Is there a way to remove a NaN values from a panda series? I have a series that may or may not have some NaN values in it, and I’d like to return a copy of the series with all the NaNs removed.