I have a simple app that import csv file and make plot but without having any error message it doesn't show plot
It's part of my module:
...
def plot_data(self):
df = pd.read_csv("file.csv")
return plotly.express.line(df)
...
and it's part of my app file:
import panel
def app(doc):
gspec = pn.GridSpec()
gspec[0, 1] = pn.Pane(instance_class.plot_data())
gspec.server_doc(doc)
Update:
After searching more I could find HttpResponse and with that I could write things to csv through using csv module but still I have no idea how to read from csv
Also I saw HttpRequest and thought maybe I can use it for reading csv but I couldn't find any sample code and couldn't understand documentation about using it as a reader
Related
I am writing an app, which takes a STL file as input. I want to get volume of the stl object without saving the stl file and use the volume to calculate a quote and post it back to browser. Right now I am using numpy-stl package, but I am stuck on how to create a mesh object for numpy-stl from the file I get with request.files['file'].read(). Any help is appreciated.
mycode:
what I get for filedata
what I get for error
You can try the following code:
import io
filedata = request.files['file'].read()
data = io.BytesIO(filedata)
tmp_mesh = mesh.Mesh.from_file("tmp.stl", fh=data)
You can use tmp_mesh object to do you interesting operation
suggestion to add error handle on something not expected
if request.files not contain 'file' keys
I would like the following code to download the xlsx files from the URL and save in drive.
I receive this error:
AttributeError: 'str' object has no attribute 'content'
Below is the code:
import requests
import xlrd
import pandas as pd
filed = 'https://www.icicipruamc.com/downloads/others/monthly-portfolio-disclosures/monthly-portfolio-disclosure-november19/Arbitrage.xlsx'
resp = requests.get(filed)
workbook = xlrd.open_workbook(file_contents = filed.content)
worksheet = workbook.sheet_by_index(0)
first_row = worksheet.row(0)
df = pd.DataFrame(first_row)
pandas already has a function thas converts excel direclty into pandas dataframe (using xlrd):
import pandas as pd
MY_EXCEL_URL="www.yes.com/xl.xlsx"
xl_df = pd.read_excel(MY_EXCEL_URL,
sheet_name='my_sheet',
skiprows=range(5),
skipfooter=0)
then yo can handle /save file using pd.DataFrame.to_excel
This function works, tested individual components. The ICICI website you have seems to give me a 404. So make sure the website works and has an excel sheet before trying this out.
import requests
import pandas as pd
def excel_to_pandas(URL, local_path):
resp = requests.get(URL)
with open(local_path, 'wb') as output:
output.write(resp.content)
df = pd.read_excel(local_path)
return df
print(excel_to_pandas("www.websiteforxls.com", '~/Desktop/my_downloaded.xls'))
As a footnote, this was super simple. And I'm disappointed you couldn't do this on your own. I might not have been able to do this 5 years ago, and that's why I decided to help.
If you want to code. Learn the basics, literally the basics: Class, Functions, Variables, Types, OOP principals. And that's all you need to start. Then you need to learn how to search, and make different components to work together the way you require them too. And with SO, if you show some effort, we are happy to help. We are a community, not a place to solve your homework. Try harder next time.
Good afternoon
I have looked through several of the solutions linked to this problem and nothing has been able to help me. I do not understand if it is an error with the actual csv file or an error within the code itself. Below is my code:
import pandas as pd
from itertools import islice
import csv
from cStringIO import StringIO
sio = StringIO()
def forex_file():
with open("USD-ZAR.csv", "r+") as exchange_file:
for row in islice(csv.reader(exchange_file), 3, 256, None):
sio.write(row)
sio.seek(0)
df1 = pd.read_csv(sio, sep=",", encoding="utf-8", delim_whitespace=True)
I purposely placed the "delim_whitespace=True" part within the code as this has been the common suggestion in many of the other posts but is has done nothing in this case as my csv file is split by normal commas and not by white space or tabs.
Any help will really be appreciated!
My code is:
import pandas as pd
df=pd.read_csv('Project_Wind_Data.csv'), usecols = ['U100', 'V100']) with open
('Project_Wind_Data.csv',"r") as csvfile:
I am trying to access certain columns within the csv file. I recive an error message saying that the data file does not exist
My data is in the following form:
This is must a be trivial issue but help would be much appreciated.
If your csv file is in the same working directory as your .py code, you use directly
import pandas as pd
df=pd.read_csv('Project_Wind_Data.csv'), usecols = ['U100', 'V100'])
If the file is in another directory, replace 'Project_Wind_Data.csv' with the full path to the file like c:User/Documents/file.txt
Very novice at Python here.
Trying to read the table presented at this page (w/ the current filters set as is) and then write it to a csv file.
http://www65.myfantasyleague.com/2017/options?L=47579&O=243&TEAM=DAL&POS=RB
I tried this next approach. It creates the csv file but does not fill it w/ the actual table contents.
Appreciate any help in advance. thanks.
import requests
import pandas as pd
url = 'http://www65.myfantasyleague.com/2017/optionsL=47579&O=243&TEAM=DAL&POS=RB'
csv_file='DAL.RB.csv'
pd.read_html(requests.get(url).content)[-1].to_csv(csv_file)
Generally, try to emphasize your problems better, try to debug and don't put everything in one line. With that said, your specific problem here was the index and the missing ? in the code (after options):
import requests
import pandas as pd
url = 'http://www65.myfantasyleague.com/2017/options?L=47579&O=243&TEAM=DAL&POS=RB'
# -^-
csv_file='DAL.RB.csv'
pd.read_html(requests.get(url).content)[1].to_csv(csv_file)
# -^-
This yields a CSV file with the table in it.