I’m new to pandas. Consider you have a state in which you have a pandas Dataframe structure of columns like below: user_id | timestamp | foo_name1 | foo_name2 | foo_name3 As we can see Dataframe has several metadata parameters, having raw string values: user_id, timestamp and several dynamic name column…
Tag: pandas
How can I drop duplicates in pandas without dropping NaN values
I have a dataframe which I query and I want to get only unique values out of a certain column. I tried to do that executing this code: db_specification is just a list containing two columns that I query. Some of the values are NaN and I don’t want to consider them duplicates of each other, how can I ach…
How to extract certain string out of long url kind of string in python using pandas
How to use regex in pandas to extract below field. the below is one of my pandas dataframe column value, but i wanted to only extract ‘eastus’ and keep it as value for this field. how to filter this. this position is always fixed Sample df: command i tried: but its not working Error: any suggestio…
Remove commas from all columns except one
Is there a way to remove commas from all columns except 1 or 2 (here, just date) in general code? (I have 20 columns in reality.) Expected output: Answer Use DataFrame.replace on columns of dataframe excluding the columns from exclude list: Result:
How to convert Array to pandas dataframe with datetime ohlcv efficiently, also divide column values by 100?
Following is the json output I am getting from api I want to convert this json/array to timestamp, ohlcv data which has DateTime index and the ohlc values must be divided by 100 or sometime by 10000 depending upon the ticksize. The final output must look something like below: I know the answer is available on…
How can I convert into lower case the first letter of each word in a pandas colum?
I would like how to convert the first letter of each word in this column: Into lower case, in order to have I know there is capitalize() but I would need a function which does the opposite. Many thanks Please note that the strings are within a column. Answer I don’t believe there is a builtin for this, …
Split Business days in respective month
df1 df2 df i need to calculate 2 things column “Total” based on working days between “From” and “To” and include any holiday from df2. split the “Total” column in respective months (Jan to Dec columns) For part 1 : The column “total” in df1 is calcul…
Write a code to perform the same operation to multiple pandas DataFrames
I am trying to write a loop/definition to perform the same operation to multiple panda DataFrames. My aim is to get 5 pandas DataFrames with names a, b, c, d and e and to multiple of operations to them. What i get is “NameError: name ‘a’ is not defined”, and the new files are not writt…
How to plot a horizontal stacked bar with annotations
I used the example for Discrete distribution as horizontal bar chart example on matplotlib Discrete distribution as horizontal bar chart to create a chart showing share of the vote in Shropshire elections 2017. However, because I did not know how to manipulate the data I had to manually enter my data in the p…
How to fix “only integers, slices (`:`), ellipsis (`…`), numpy.newaxis (`None`) and integer or boolean arrays are valid indices” in this example
I have the following type of data. This is what I tried: And I got the error. Answer All you should need is: