Reading JSON-specified data from the load JSON file (based on Python 3.6)

<--------JSON file--------->
{
  "DCN": {
    "FileName": "at0101.07422",
    "Variable": "Temperature",
    "Highest_temp": "Maximum temperature",
    "Lowest_temp": "Lowest temperature"
  },
  "DMD": {
    "FileName": "bp0101.07422",
    "Variable": "Air Pressure",
    "Highest_pre": "Maximum air pressure",
    "Lowest_pre": "The most low pressure"
  },
  "DMY": {
    "FileName": "hu0101.07422",
    "Variable": "Relative humidity",
    "Highest_h": "Maximum relative humidity",
    "Lowest_h": "Minimum relative humidity"
  }
<------load JSON file reads the specified data--------->

Import JSON
Import OS
Import datetime
Import time
Import Linecache

# Original file path
File_path = "e:/transer/git_transer/transer/filepath/"
# Json_save_path
Save_path = "e:/transer/git_transer/transer/format_json/"

Datajson = json.load (open (' Format_file.json ', encoding= ' UTF-8 '))
#气温
at = datajson["at"]
At_file_path = file_path + at["filename"]
At_filename =at["filename"]
At_name = at["Name"]
At_max = at["Air_temp_max"]
At_min = at["Air_temp_min"]
At_data = at["Air_temp"]
At_savename = at["Save_name"]

#气压
bp = datajson["BP")
Bp_file_path = file_path + bp["filename"]
Bp_filename = bp["filename"]
Bp_name = bp["Name"]
Bp_max = bp["Surface_pressure_max"]
Bp_min = bp["Surface_pressure_min"]
Bp_data = bp["Surface_pressure"]
Bp_savename = bp["Save_name"]

Reading JSON-specified data from the load JSON file (based on Python 3.6)