2016年5月15日 · As you can see, we can easily access different parts of the file by using our read_csv() function and creating a nested-list object. Finally, if you want to print to the entire file, you simply use a for loop after creating the data-object.

2016年8月29日 · First you seemed to ask "How to convert strings to floats, on csv import", then you morphed it to 'I suppose the overall question is really just "What's the easiest way to read, organize, and synthesize data in .csv or excel format using Python?"' These are seriously different questions (see my answer for real-world examples why), and the answer if you specifically …

2012年11月17日 · I have a CSV file, here is a sample of what it looks like: Year: Dec: Jan: 1 50 60 2 25 50 3 30 30 4 40 20 5 10 10 I know how to read the file in and print each

2017年10月7日 · @martineau, I am trying to import email list in CSV file into a python list. Array list length is 1 only ` len (data)=1` but I have over 100 emails in CSV file.

Does the csv file also contains xyz.CSV col1,col2,col3,col4. If that is the case then first line contains only one element i.e. ['xyz.CSV'] and then when you try to access [1] onwards it fails.

2015年11月27日 · An old answer to Prevent pandas from automatically inferring type in read_csv suggests first using a numpy record array to parse the file, but given the ability to now specify column dtypes, this shouldn't be necessary.

how to specify the datetime format in read_csv Asked 10 years, 5 months ago Modified 1 year, 11 months ago Viewed 26k times

To read a CSV file as a pandas DataFrame, you'll need to use pd.read_csv, which has sep=',' as the default. But this isn't where the story ends; data exists in many different formats and is stored in different ways so you will often need to pass additional parameters to read_csv to ensure your data is read in properly.

2016年3月6日 · The csv library has readers for parsing CSV files which correctly handle the aforementioned special case, but I can't use those because I need to parse just a single string. However if the Python CSV allows parsing a single string itself then that's news to me.

Importing csv from a subdirectory in Python Asked 13 years, 4 months ago Modified 8 years, 2 months ago Viewed 55k times