Thanks so much.

Hi, my friends,

I have a question to ask you. I am dealing with thousands of csv files in one directory. Some of csv files are empty with file size 0. How can I skip those empty files when I open...

Thanks so much. It is really very helpful although I will follow your direction to get the point I want to. It is really very important to have some guard to protect my model hebind the scene. Many...

Thanks so much for your quick reply. Yes. I need to have 1000+ instances of a class. Also the number of attributes in the class may change so I do not want to make the change in copying the class...

Hi, Dear my friends,

I has been using python for a while. But I just realized that when you make a copy of python class, it is copying a link to the class. So when you make the change to the...

Hi, Dear my friends,

I have a trick questions to ask you about python scripts for help.

How can I set up a complied python code with a password so that nobody can touch or modify it and even...

Hi, My friends,

I have aquestion to ask you. I want to output a list of class objects to a file in csv format.
but last step in writer.writerow does not work. Can you tell me what's wrong and...

Hi, Jeff,

That's the nice code. Thanks so much.
But my problem is that I have thousands people of a large list of class objects to assign the values with about 30 attributes in the class. I can...

Hi,

I have a question regard to assign the values to each memebrs of the class objects because I have a large list of class objects. Can I do the following? If not, how can I achieve the same...

Hi, Thanks.

your code works in Pythonwin but fails when I put it in the script in easyEclipse for python:
The code is:
i =0
for row in reader:
i = i + 1
tradingDate,...

One more question: how can I convert a list of string, like here marketIndex to float?
Similarly, how can I concert a matrix of string into float type of data?

Thanks.

John

Thanks so much. Yes. that works fine.

John

Hi, my friends,

I try to use csv module to input data in csv format but split does not work. Could you please help? The input data is 2 column data separated in comma as csv format.

The code is...

Thanks so much, Jeff.

John

Here is the code:

def ols(x, y):

class output:
pass

results = output()

results.method = 'ols'

Hi,

I have a question ask you or expert. Can python's function return a class at the end of function definition. The class have only a set of data members like struct in C. Please help and thanks...

I use SPE IDE 0.8.3. I tried several times on indentation. It looks like there is no indentation mistake. But when I run the script. It always points to last line with the syntax error: can't assign...

Hi, Ny friends,

This is my 2nd week to learn and wite codes in python. I encounter a debug error in the last line of code or SizeDiffE(k) = j
. I could not figure out? I am using SPE IDE 0.8.3...

Thanks so much. That's really neat code. Appreciated.

John

Hi,

I am newie to python.

How I combine 2 multi-dimension array into one by column?
here is an exmaple:

a = 1 2 3
2 3 4
3 4 5

Hi, my friends,

I am new to python. I have a question to ask you a empty class with a set of data memebers. The data members could be array. what is wrong with the following code?
Thanks in...

That's 5 by 3 array separated by space. How can I sort it by any columns? Thanks.

Hi,
Could u please help me to sort this 3 dimension data in python? How can sort this 5 by 3 array with 1st column or last column? Thanks a lot.

marek brutalski 20
zenia ...

Hi, my friends,

I am new to python. I am trying to user csv module to read and write the data in csv. Here is data format. # of columns in each row are the same. 1st row is a header. how I can...

Thanks a lot. But this is kind of risky for a large project as you may have many loop and if to have indentations.

John

Hi, My friends,

I am new to python. I try to figure out how python knows the end of loop or the end of a block of codes in while... else code
Here is the example:
while E:
Bt
else:
Bf

Thanks so much. It is very helpful. I will try out and thanks again.

John

Well, the data is from csv file in the directory for import. for Export, it will save to a CSV file when the calculation is done. The size of records is 20,000 by 20,000. It takes a lot of computer...

Well, the data is from csv file in the directory for import. for Export, it will save to a CSV file when the calculation is done. The size of records is 20,000 by 20,000. It takes a lot of computer...

Dear my friends,

I am working a project to import and export a large amount data. Right now I save the data in spreadsheet but time consuming. I want to import and export those mixed data...