problem description I read the difference data from two different excel, and then put them into a new excel. It is normal to display a column of ID number under IDE, but it becomes a scientific counting method in excel. Is there a way to make a column...
for example, there is data A B C 1 1 br 2 3 2 3 3 3 4 record5 1 3 such a table should be divided into A B C 1 13 1 23 2 3 3 43 1 53 1 63 excuse me how to operate ...
Baidu interview questions, roughly means that there is a file, the file is very large can not be read at one time (may not be loaded into memory), the file is stored in the IP address, how to quickly find the duplicate IP address? Ask for advice. The ...
df is a dataframe , in which there are some NaN values in df . The following code formats each column in turn (for example, changing money into a string that begins with a dollar sign, and the corresponding function is formatter_function ). How t...
def hour_exceed (df): i=df.values if i is np.nan: return np.nan elif i>200: return 1 elif i<200: return 0 < H1 > dataframe < H1 > df15.head () Out [21]: time 1036A 1037A 1040A 1041A 1051A 1053A 1054A 0 2...
Table 1 add column matching Table 2 key _ word, if Table 1 add contains Table 2 key_word, write group, in Table 1 column 4, if not, mark "not included ". PS: I also measured with iteration, Cartesian product also tried, but did not achieve the desired ...
such as question: how to set chunksize and shape? of dask.array the code is as follows >>> x = data.values >>> x dask.array<values, shape=(nan, 24), dtype=int64, chunksize=(nan, 24)> >>> y = data[ label ].values >...
when using pandas for file writing, if the original sheet already has data, the newly written data is overwritten on the original data without deletion. For example, there are 4 rows of data originally, and I want to delete one row. After read is datafr...
there are at most four sources of the same data (revenue data) here, and some are null,. I want to choose one of these four sources as the statistical source (put in the value column). Which method should I choose to do this? ...
is writing a simple web app in flask. the function you want to achieve is: upload an excel file Clean up the data with pandas the resulting dataframe is previewed with a table at the front end After the preview is correct, upload it to the dat...
now there are two tables (txt files). You need to change one column value of one file to the corresponding column value of the other file, as follows: File 1 2 I need to reassign the value of file 1 s x and y column according to the column name...
df = pd.DataFrame([[4, 9],[4, 2], [4, 5], [5, 4]], columns=[ A , B ]) df.groupby([ A ]).apply(lambda x : print(x, n )) df is: A B 0 4 9 1 4 2 2 4 5 3 5 4 the output after using apply is as follows: A B 0 4 9 ...
import pandas as pd reader=pd.read_csv file1 = reader.get_chunk (1000) file1.columns= [ souceip , sourceport , destport , protocol , flags , fwd , stos , pkt , byt , attack_type ] print (file1) here you re-modify the column nam...
to export a batch of Json data from Mongodb, you need to transfer to Mysql, but the exported Json format cannot be directly written to mysql, so you want to convert the data to Pandas s dataframe, and then write to sql: through dataframe . import panda...
coding can be implemented in all four of the above methods. What s the difference between them? Of course, the length of the script is different. I can already see it. < H1 > get_dummies method < H1 > df7 = DataFrame({ key :list( bbacab ), ...
mainly wants to do tagging for named entity recognition; specifically, there are two excel files called A (n row 1 column), B (n row 1 column). for example, each line in An is a descriptive sentence, and each line in B is an entity name how to effici...
csv`import numpy as npimport pandas as pdf=open( G:XueYegrades.csv , rb )df=pd.read_csv(f,low_memory=False,usecols=[0,1,3,4,5,7,8,15,16])group=df.groupby([ xh , xm ],sort=False)[ xf ]print(group.sum())` as a result, he counted the student n...
the value in the figure is "pass " After pandas reads the csv file, I want to delete the data line whose value is a string in the kscj column. What should I do? ...
I have a txt file encoded in unicode, : 1.with open( STK_MKT_ValuationMetrics.txt , rb ) as f:: utf-8 codec can t decode byte 0xff in position 0: invalid start byte2.with open( STK_MKT_ValuationMetrics.txt , rb ,encoding= utf-8 ) as ...
such a table, if you want to group it with key1, take the row with the larger data2, and how do you make a table? tried df.groupby ( key1 ,as_index=False). Max () takes the largest of all columns. This won t work. What can I do? this is the origin...
there are three div, corresponding to three js files in one page. Set the route for their joining. js modehash; what is the difference between the specific settings of this mode? why can t it be displayed normally when it is set to history? ...
vue server rendering uses vuex to save login status. After refreshing, vuex data is lost, and local storage cannot be used in the routing guard in beforeEach. After using it, report 500 directly, and the pages are gone . Code: localstoragelocalst...
topic description there is a table to display color information, and each row has a drop-down selection component that can be used to select a variety of colors (there may be thousands of color data). There is also a button, click the button to add a ...
problem description when I use window.open (url, newwidnow , height, width, left, top.) ) in $nextTick to open a new window with a fixed width and height and a fixed display position, the code executes to window.open , but the new window does n...
problem description is developing a table that can merge and split cells, similar to excle. However, when using the mouseenter event, only the first time is triggered normally, and when the cell is selected the second time, the previous mouseenter eve...