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table.py
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table.py
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import os
import json
import uuid
from bokeh.models import ColumnDataSource
from bokeh.models.widgets import DataTable, TableColumn
from bokeh.embed import components
from bokeh.resources import INLINE
from flask import Flask, render_template, flash, request
from wtforms import Form, validators, StringField, SubmitField
app = Flask(__name__)
app.config.from_object(__name__)
app.config['SECRET_KEY'] = '1234'
DATA_FOLDER = os.environ.get('DATA_FOLDER', 'data')
class ReusableForm(Form):
value = StringField('Value:', validators=[validators.required()])
key = StringField('Key:', validators=[validators.required()])
def list_files(foldername):
"""
gets names of all the files in the folder
Args:
foldername: (string)
Returns:
files: (list)
"""
return [x for x in os.scandir(foldername) if x.is_file()]
def get_data(files):
"""Get data as dict from folder
load all file information from all json-files in folder "foldername"
Args:
files: (list)
Returns:
list[dict]: (list of dictionaries) containing the information from loaded json-files
"""
dicts = []
for filename in files:
with open(filename, 'r') as file:
dicts.append(json.load(file))
return dicts
def get_dict_keys(data, files):
"""
filters all the keys out of data
Args:
data: (list of lists of dictionaries)
files: (list)
Returns:
keys: (list) set of keys contained in data
"""
key_list = []
for i in range(len(data)):
data_file = data[i] # iterating over the dicts- list (extracting the essence again)
key_list.append(list(data_file))
keys = []
for n in range(len(files)):
for i in range(len(key_list[n])):
keys.append(key_list[n][i])
keys = list(set(keys))
return sorted(keys)
def clean_data(keys, data, default="-"):
"""
cleans the data in order to archive the correct format
Args:
data:
keys: (list)
default: (any character)
Example:
>>> clean_data([{'keybla': 1}, {'keybums': 2}], ['keybla', 'keybums'])
... = {'keybla': 1, 'keybums': default}, {'keybla': default, 'keybums': 2}
Returns:
cleaned_data: (dictionary of lists)
"""
lists = [[] for x in range(len(keys))]
for i in range(len(keys)):
for n in range(len(data)):
if keys[i] in list(data[n]):
lists[i].append(data[n][keys[i]])
else:
lists[i].append(default)
data = {}
for i in range(len(lists)):
data[keys[i]] = lists[i]
print(data)
return data
def add_data(added_data, cleaned_data, keys, default="-"):
print(added_data)
for key in keys[1:]:
cleaned_data[key].insert(0, default)
cleaned_data["id"].insert(0, added_data[0]["id"])
cleaned_data[added_data[1]].insert(0, added_data[0][added_data[1]])
def render_table(cleaned_data, keys):
"""
creates the visual bokeh- table
Args:
cleaned_data: (dictionary of lists)
Returns:
DataTable
"""
source = ColumnDataSource(cleaned_data)
columns = []
for i in keys:
columns.append(TableColumn(field=str(i), title=str(i)))
data_table = DataTable(source=source, columns=columns, width=1200)
return data_table
@app.route('/', methods=['GET', 'POST'])
def create_table():
form = ReusableForm(request.form)
if request.method == "POST":
value = request.form['value']
key = request.form['key']
if form.validate():
flash('Key: ' + key + " and Value: " + value + " have been added to your table!")
added_data = [{"id": str(uuid.uuid1()), key: float(value)}, key]
files = list_files(DATA_FOLDER)
data = get_data(files)
keys = get_dict_keys(data, files)
print(keys)
cleaned_data = clean_data(keys, data)
if request.method == "POST":
add_data(added_data, cleaned_data, keys)
bokeh_table = render_table(cleaned_data, keys)
js_resources = INLINE.render_js()
css_resources = INLINE.render_css()
script, div = components(bokeh_table)
return render_template("table2.html", script=script, div=div,
js_resources=js_resources, css_resources=css_resources, form=form)
if __name__ == '__main__':
app.run(port=5000, debug=True)