我希望根据烧瓶应用程序上的用户输入创建动态图.但是我得到以下错误:字符串参数预期,得到'字节'
如果我使用io.BytesIO(),我没有收到此错误,但我没有得到test.html上的情节
from flask import Flask
from flask import render_template
import matplotlib.pyplot as plt
import io
import base64
app = Flask(__name__)
@app.route('/plot')
def build_plot():
img = io.StringIO()
y = [1,2,3,4,5]
x = [0,2,1,3,4]
plt.plot(x,y)
plt.savefig(img, format='png')
img.seek(0)
plot_url = base64.b64encode(img.getvalue())
return render_template('test.html', plot_url=plot_url)
if __name__ == '__main__':
app.debug = True
app.run()
的test.html
<!DOCTYPE html>
<html>
<title> Plot</title>
<body>
<img src="data:image/png;base64, {{ plot_url }}">
</body>
</html>
fur*_*ras 16
使用BytesIO和以后decode()
工作实例
from flask import Flask
#from flask import render_template
import matplotlib.pyplot as plt
import io
import base64
app = Flask(__name__)
@app.route('/plot')
def build_plot():
img = io.BytesIO()
y = [1,2,3,4,5]
x = [0,2,1,3,4]
plt.plot(x,y)
plt.savefig(img, format='png')
img.seek(0)
plot_url = base64.b64encode(img.getvalue()).decode()
return '<img src="data:image/png;base64,{}">'.format(plot_url)
if __name__ == '__main__':
app.debug = True
app.run()