fblanke/tvstud-download-digital
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Export plot to svg instead of png

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This commit is contained in:
Felix Blanke 2023-08-27 23:20:16 +02:00
parent 0e16891961
commit 0eb3bb6b91
2 changed files with 7 additions and 12 deletions
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2
templates/base.html
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@ -13,7 +13,7 @@
</header> </header>
<main> <main>
<img src="{{ image|safe }}"/> {{ image|safe }}
{{ tables|safe }} {{ tables|safe }}
</main> </main>
</article> </article>

17
wsgi.py
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@ -1,4 +1,3 @@
import base64
import datetime import datetime
import io import io
from itertools import chain from itertools import chain
@ -11,7 +10,6 @@ import numpy as np
import pandas as pd import pandas as pd
from flask import Flask, render_template, request from flask import Flask, render_template, request
from flask_caching import Cache from flask_caching import Cache
from matplotlib.backends.backend_agg import FigureCanvasAgg as FigureCanvas
from download_digital import construct_dataframe, get_bez_data from download_digital import construct_dataframe, get_bez_data
@ -84,7 +82,7 @@ def plot(
sum_val = current_df[["Digitale Befragung"]].sum().iloc[0] sum_val = current_df[["Digitale Befragung"]].sum().iloc[0]
df.loc[datetime.datetime.now()] = sum_val df.loc[datetime.datetime.now()] = sum_val
plt.figure(dpi=300) fig = plt.figure(dpi=300)
# fill weekends # fill weekends
max_date = max(data_dict.keys()) max_date = max(data_dict.keys())
@ -155,15 +153,12 @@ def plot(
plt.axhline(y=total_target, color="#48a9be", linestyle="--") plt.axhline(y=total_target, color="#48a9be", linestyle="--")
plt.tight_layout() plt.tight_layout()
# Convert plot to PNG image # Convert plot to SVG image
pngImage = io.BytesIO() imgdata = io.StringIO()
FigureCanvas(plt.gcf()).print_png(pngImage) fig.savefig(imgdata, format="svg")
svgImage.seek(0) # rewind the data
# Encode PNG image to base64 string return svgImage.read()
pngImageB64String = "data:image/png;base64,"
pngImageB64String += base64.b64encode(pngImage.getvalue()).decode("utf8")
return pngImageB64String
@app.route("/") @app.route("/")