类型错误：预期的 str、bytes 或 os.PathLike 对象，而不是 GeojsonFile

Question

datafile = open(filename, "r"); TypeError: expected str, bytes or os.PathLike object, not GeojsonFile

can someone help me why this happen? i want to read spatial data in geojson format.

Act i want to store geojson data into the database. I already connect the database which is MongoDB database. Im using gridfs to overcome the limitation, but first i need to read the data and store into the database.

many thanks

    #read in the spatial data
filename = "/dami_data/data1/countries.geojson"
geojfile = pygeoj.load(filename)
for feature in geojfile:
    print(feature.geometry.type)
    print(feature.geometry.coordinates)
datafile = open(filename, "r")
thedata = datafile.read()

#create a gridFS object 
filesystem = gridfs.GridFS(db, collection='data')

#write data to GridFS
myfile = filesystem.put(thedata, filename = "countries")
print ("Store to database :)")

#retrieve what was just stored/document
filesystem.get(myfile).read()

Answer 1

In your code, filename refers to a GeojsonFile object instead of a filename.

If the file you want to read raw is the same file as the file pygeoj reads, then you should do:

filename = "/dami_data/test_data/roads.geojson"
geojfile = pygeoj.load(filename)
for feature in geojfile:
    print(feature.geometry.type)
    print(feature.geometry.coordinates)
datafile = open(filename, "r")
thedata = datafile.read()
datafile.close()

Though you can do it, you should consider using geojfile instead of reading the file again. It already holds information that you needed from that file anyways (as pointed out by @Karl Knechtel in the comments).

If not, meaning you want to read a different file, you should pass the filename:

filename = "/dami_data/test_data/roads.geojson"
geojfile = pygeoj.load(filename)
for feature in geojfile:
    print(feature.geometry.type)
    print(feature.geometry.coordinates)
datafile = open("my_other_file_name", "r")
thedata = datafile.read()
datafile.close()

Last case, if you would like to get the raw data of that GeojsonFile, do:

filename = "/dami_data/test_data/roads.geojson"
geojfile = pygeoj.load(filename)
for feature in geojfile:
    print(feature.geometry.type)
    print(feature.geometry.coordinates)
thedata = str(geojfile)