LoggerRead 0.1.0

A simple module for reading various datalogger output files

About

A library of file readers for permafrost-related dataloggers. Instead of trying to make a single csv-reader that can handle any format, this treats each datalogger separately. Currently the following data types are supported:

• GeoPrecision (GP5W)
• GeoPrecision (FG2)
• HOBO (HOBOware)

Installation

To install LoggerReader, follow these instructions:

git clone https://github.com/nicholas512/LoggerRead
cd LoggerRead
python setup.py develop

Consider using a virtual environment, because some dependencies are installed.

Using LoggerReader

The object that is used to read the logger data will differ depending on what kind of instrument the data comes from. However, each reader follows the same behaviour. They all have the .read() method that takes the file name as an argument. You can create the reader object first and then call the .read() method, or just run everything on one line.

Reader().read(file)

OR

reader = Reader()
data = reader.read(file)

Some datalogger types may accept or require other information in order to read the file correctly.

GeoPrecision

Geoprecision logger format differs between the FG2 and GP5W variants. To read a GeoPrecision file, use either the FG2 or GP5W object

FG2

FG2 is the newer software for GeoPrecision instruments:

from LoggerReader.readers import FG2
from pkg_resources import resource_filename
fg2_file = resource_filename("LoggerReader", "sample_files/FG2_399.csv")

# Read an FG2 file
FG2().read(fg2_file)

GP5W

GP5W is the older software for GeoPrecision instruments:

from LoggerReader.readers import GP5W
from pkg_resources import resource_filename
gp5w_file = resource_filename("LoggerReader", "sample_files/GP5W_260.csv")

# To read a file, you might first create a reader object 
reader = GP5W()
reader.read(gp5w_file)

# Or instead, read the data in one line
data = GP5W().read(gp5w_file)

HOBO

Because of the variability of HOBOWare CSV exports, the HOBO reader relies on on a HOBOProperties configuration object. This can be configured manually (most reliable) or autodetected from a file.

The HOBOProperties configuration object

from LoggerReader.readers import HOBOProperties
from pkg_resources import resource_filename
from pathlib import Path

# Autodetect file structure
hobo_file = resource_filename("LoggerReader", "sample_files/hobo_1_AB_classic.csv")
P = HOBOProperties.autodetect(hobo_file)
print(P)

# HOBOWare 'default' format
print(HOBOProperties.defaults())

# HOBOWare 'classic' format
print(HOBOProperties.classic())

# Custom format (unspecified properties are defaults)
P = HOBOProperties(date_separator=",",
                   date_format="YMD",
                   include_line_number=True,
                   include_plot_details=False,
                   no_quotes_or_commas=False,
                   separate_date_time=False)
print(P)
savepath = Path(Path.home(), "custom_hobo_properties.json")
P.write(savepath)  # Save to file

# Read from a saved file
Q = HOBOProperties.from_file(savepath)  # Read from a file
print(Q)

Reading HOBO files with the HOBO object

from LoggerReader.readers import HOBO, HOBOProperties
from pathlib import Path
from pkg_resources import resource_filename

classic_file = resource_filename("LoggerReader", "sample_files/hobo_1_AB_classic.csv")
defaults_file = resource_filename("LoggerReader", "sample_files/hobo_1_AB_defaults.csv")

# To autodetect HOBOWare Properties:
data = HOBO().read(defaults_file)

# To manually specify a the HOBOWare configuration, initialize the HOBO reader with a HOBOProperties object
classic_file = resource_filename("LoggerReader", "sample_files/hobo_1_AB_classic.csv")
classic_properties = HOBOProperties.classic()
hobo = HOBO(classic_properties)
data = hobo.read(classic_file)

Format

Reader objects save csv data in a pandas dataframe stored as the DATA attribute. Column titles are left unchanged with the exception of the datetime column which is renamed to TIME. It is always the first column in the dataframe.

Where possible, any metadata that is found in the file is stored in a META attribute.