關於python的一些應用疑問

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球先生

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Nov 17, 2017, 12:54:56 AM11/17/17

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以下是小弟寫的程式，大部分參照網路上的寫法，想透過flask創一個web，但顯示如下，<數字>這些我不知道該放入哪些資訊才能將圖片裡的資料放入裡面，跪求大大幫忙!!!!!

import os,sys

from flask import Flask, request, redirect, url_for,send_from_directory

from werkzeug.utils import secure_filename

from werkzeug import SharedDataMiddleware

UPLOAD_FOLDER = 'C:/Users/Administrator/Desktop/照片/lena'

ALLOWED_EXTENSIONS = set(['txt', 'pdf', 'png', 'jpg', 'jpeg', 'gif'])

app = Flask(__name__)

app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER

def allowed_file(filename):

return '.' in filename and \

filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS

@app.route('/', methods=['GET', 'POST'])

def upload_file():

if request.method == 'POST':

if 'file' not in request.files:

flash('No file part')

return redirect(request.url)

file = request.files['file']

if file.filename == '':

flash('No selected file')

return redirect(request.url)

if file and allowed_file(file.filename):

filename = secure_filename(file.filename)

file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))

return redirect(url_for('uploaded_file',

filename=filename))

return '''

<!doctype html>

<title>上傳照片並顯示</title>

<body>

<p>顯示照片位置</p>

</form>

</body>

</html>

'''

@app.route('/uploads/img/<filename>')

def uploaded_file(filename):

html = '''

<!DOCTYPE html>

<html>

<body>

<style>

table, th, td {

border: 1px solid black;

}

</style>

</head>

<body>

<table>

</colgroup>

<tr>

</tr>

<tr>

</tr>

</table>

<p >以上為圖片exif資訊</p>

// 設定影像大小

function setImgSize(id, imgWidth, imgHeight){

document.getElementById(id).width = imgWidth;

document.getElementById(id).height = imgHeight;

}

</script>

</body>

</html>

''' % ("/uploads/" + filename)

return html

app.add_url_rule('/uploads/<filename>', 'uploaded_file',

build_only=True)

app.wsgi_app = SharedDataMiddleware(app.wsgi_app, {

'/uploads': app.config['UPLOAD_FOLDER']

})

from PIL import Image #顯示出經緯度

from PIL.ExifTags import TAGS, GPSTAGS

def get_exif_data(image):

"""Returns a dictionary from the exif data of an PIL Image item. Also converts the GPS Tags"""

exif_data = {}

info = image._getexif()

if info:

for tag, value in info.items():

decoded = TAGS.get(tag, tag)

if decoded == "GPSInfo":

gps_data = {}

for t in value:

sub_decoded = GPSTAGS.get(t, t)

gps_data[sub_decoded] = value[t]

exif_data[decoded] = gps_data

else:

exif_data[decoded] = value

return exif_data

def _get_if_exist(data, key):

if key in data:

return data[key]

return None

def _convert_to_degress(value):

"""Helper function to convert the GPS coordinates stored in the EXIF to degress in float format"""

d0 = value[0][0]

d1 = value[0][1]

d = float(d0) / float(d1)

m0 = value[1][0]

m1 = value[1][1]

m = float(m0) / float(m1)

s0 = value[2][0]

s1 = value[2][1]

s = float(s0) / float(s1)

return d + (m / 60.0) + (s / 3600.0)

def get_lat_lon(exif_data):

"""Returns the latitude and longitude, if available, from the provided exif_data (obtained through get_exif_data above)"""

lat = None

lon = None

if "GPSInfo" in exif_data:

gps_info = exif_data["GPSInfo"]

gps_latitude = _get_if_exist(gps_info, "GPSLatitude")

gps_latitude_ref = _get_if_exist(gps_info, 'GPSLatitudeRef')

gps_longitude = _get_if_exist(gps_info, 'GPSLongitude')

gps_longitude_ref = _get_if_exist(gps_info, 'GPSLongitudeRef')

if gps_latitude and gps_latitude_ref and gps_longitude and gps_longitude_ref:

lat = _convert_to_degress(gps_latitude)

if gps_latitude_ref != "N":

lat = 0 - lat

lon = _convert_to_degress(gps_longitude)

if gps_longitude_ref != "E":

lon = 0 - lon

return lat, lon

if __name__ == "__main__":

image = Image.open('C:/Users/Administrator/Desktop/照片/lena/DJI_0239.JPG')

exif_data = get_exif_data(image)

print (get_lat_lon(exif_data))

if __name__ == "__main__":

app.run(port=80)

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