= CSV Data Import from the Web2py CLI =
[[TOC]]
== Importing Data ==

It is possible to manually import CSV files from the web2py shell (CLI = command line interpreter, a Python shell with the web2py environment).

Start the web2py CLI with the Eden data model environment:
{{{#!python
python web2py.py -S eden -M
}}}

Override authorization:
{{{#!python
auth.override = True
}}}

Define the target resource:
{{{#!python
resource = s3db.resource("project_activity")
}}}

Import data:
{{{#!python
success = resource.import_xml(open("filename.csv", "rb"),                   # CSV format requires file handle, XML accepts filename
                              format="csv",                                 # "xml", "json" or "csv"
                              stylesheet="activity.xsl",                    # filename (with path) is sufficient
                              extra_data=dict(Organisation="Example.org"),  # extra columns to be added to each row
                              files={"image.png":open("image.png", "rb")},  # file attachments, filenames are the keys of the dict
                              ignore_errors=True)                           # skip invalid records (False rolls back the import on error)
}}}

See errors (error message and error tree are returned in any case, even with ignore_errors=True):
{{{#!python
print success                 # prints a JSON message with the error message and the JSONified error tree
print resource.error          # prints the error message

print current.xml.tostring(resource.error_tree, pretty_print=True) # prints the error tree as XML
}}}

Do not forget to commit the import (if you want to keep it):
{{{#!python
db.commit()
}}}

If you were only testing (e.g. to see validation errors), and now want to discard the import, you can either leave the shell without calling {{{db.commit()}}} - or you do an explicit:
{{{#!python
db.rollback()
}}}

== Tools to develop and debug XSLT stylesheets ==

If you want to test your XSLT stylesheet, you can also use:
{{{
python static/scripts/tools/csv2xml.py mycsvfile.csv mystylesheet.xsl
}}}

This converts the CSV file into XML, transforms it with the specified stylesheet and prints the result to the standard output.

If you redirect the output into a file, you can also use this script to produce S3XML sources from CSV files (e.g. in order to test web services):
{{{
python static/scripts/tools/csv2xml.py mycsvfile.csv mystylesheet.xsl > myxmlfile.xml
}}}

If you want to see the XML before transformation, just omit the stylesheet parameter:
{{{
python static/scripts/tools/csv2xml.py mycsvfile.csv
}}}

See XsltTemplates