[BUG] Python3 client deserialization mutates string data

[spacether]

Description

When deserializing utf-8 string data in the python3 client, the client incorrectly adds a lot of whitespace.

openapi-generator version

3.3.4

OpenAPI declaration file content or url

swagger: '2.0'
info:
  version: ''
  title: carrier api
host: example.com
schemes:
  - https
paths:
  /v3/shipments/{shipmentId}/label:
    get:
      operationId: getShipmentLabel
      summary: Retrieve a shipment's label
      description: Retrieve a shipment's label
      parameters:
        - in: path
          name: shipmentId
          type: string
          required: true
          description: the shipmentId to use
        - in: query
          name: format
          type: string
          required: true
          description: The format of the resulting label
          default: ZPL
          enum:
            - ZPL
        - name: Content-Type
          in: header
          required: true
          type: string
          default: application/json
        - name: Authorization
          in: header
          required: true
          type: string
          default: 'Token <<apiv3_token>>'
        - name: Accept-Charset
          in: header
          required: true
          type: string
          default: utf-8
        - name: Accept
          in: header
          required: true
          type: string
          default: application/json
      consumes:
        - application/json; charset=utf-8
      responses:
        200:
          description: 'LabelResponse'
          schema:
            $ref: "#/definitions/LabelResponse"
definitions:
  LabelResponse:
    type: object
    properties:
      label:
        type: string

Command line used for generation

openapi-generator generate -i carrierapi.yaml -g python -o ./carrierapi -DpackageName=carrierapi

Steps to reproduce

Ingest the below response as a LabelResponse:

{"label":"^XA~DGR:LOGO.GRF,3200,20,,::::::::::::::::::::::::::::::::::::::::::::::::::Q0G1GFGCO0G3GFGCT0P0G1IFGEM0G3IFGCS0P0KFG8K0G1KFS0O0G3KFGCK0G7KFGCR0O0MFK0MFR0N0G1MFG8I0G3MFG8Q0N0G3MFGEI0G3MFGCQ0N0G7MFGEI0NFGEQ0N0OFI0OFQ0M0G1OFG8G0G1OFG8P0M0G1IFGCG0G1IFGCG0G3OFG8P0M0G3IFI0G7HFGCG0G3IFG8G0G3IFGCP0M0G7HFGEI0G3HFGEG0G7IFI0IFGCP0M0G7HFG8I0G1IFG0IFGCI0G7HFGEP0M0G7HFK0IFG0IFG8I0G3HFGEP0M0IFK0G7HFG1IFJ0G1IFP0M0HFGEK0G7HFG9IFK0IFP0L0G1HFGEK0G7HFG9HFGEK0IFP0L0G1HFGEK0G3HFGBHFGCK0G7HFG8O0L0G1TFGCK0G7HFG8O0L0G1TFGCK0G3HFG8O0L0G1TFG8K0G3HFG8O0:::::L0G1TFGCK0G3HFG8O0L0G1HFGEN0G3HFGCK0G3HFG8O0L0G1HFGEN0G3HFGCK0G7HFG8O0L0G1HFGEN0G3HFGEK0G7HFG8O0M0IFN0G3HFGEK0IFP0M0IFG8M0G3IFK0IFP0M0IFGCJ0G1G8G0G3IFJ0G1IFP0M0G7HFGEJ0G3GCG0G3IFG8I0G3HFGEP0M0G7IFJ0GFGEG0G3IFGCI0G7HFGEP0M0G3IFGCH0G3HFG0G3JFI0IFGCP0M0G1JFGCG3IFG8G3JFGCG0G7IFGCP0M0G1OFG8G3PFG8P0N0OFGCG3PFQ0N0G7NFGEG3PFQ0N0G3NFGEG3OFGEQ0N0G1NFGCG3OFGCQ0O0NFG0G3OFG8Q0O0G7LFGEG0G3HFG8LFR0O0G1LFG8G0G3HFG8KFGCR0P0G7JFGCH0G3HFG8G1JFS0Q0IFGEI0G3HFG8G0G7HFGCS0R0HFJ0G3HFG8H0GFU0X0G3HFG8X0::::::::::::::::::,::::::::::::::::::::::::::::::::::::::::^FS^FO60,130^XGR:LOGO.GRF,1,1^FS^CI28^CFC,60^FO340,248^FD^FS^FO550,120^BQ,2,8^FDHM,A4666086^FS^CFC,30^A0N,60,70^FO60,325^FDEasyPost^FS^CFA,30^FO60,390^FD1937 Davis Street Suite A^FS^FO60,440^FDSan Leandro CA 94577^FS^CFC,30^A0N,60,70^FO60,515^FDJohn Doe^FS^FO60,580^FD2250 Shattuck Avenue^FS^FO60,635^FDPenthouse^FS^FO60,690^FDBerkeley CA 94704^FS^FXBARCODE^BY3,2,200^FO200,765^BC^FD123^FS^CFA,30^A0N,40,45^FO60,1020^FDREF#:^FS^FO170,1020^FD^FS^FO60,1110^A0N,40,45^FDDATE:^FS^FO170,1110^FD^FS^FO615,1110^A0N,40,45^FD#4666086^FS^XZ"}

The client converts it to:

{'label': '^XA~DGR:LOGO.GRF,3200,20,,::::::::::::::::::::::::::::::::::::::::::::::::::Q0G1GFGCO0G3GFGCT0P0G1IFGEM0G3IFGCS0P0KFG8K0G1KFS0O0G3KFGCK0G7KFGCR0O0MFK0MFR0N0G1MFG8I0G3MFG8Q0N0G3MFGEI0G3MFGCQ0N0G7MFGEI0NFGEQ0N0OFI0OFQ0M0G1OFG8G0G1OFG8P0M0G1IFGCG0G1IFGCG0G3OFG8P0M0G3IFI0G7HFGCG0G3IFG8G0G3IFGCP0M0G7HFGEI0G3HFGEG0G7IFI0IFGCP0M0G7HFG8I0G1IFG0IFGCI0G7HFGEP0M0G7HFK0IFG0IFG8I0G3HFGEP0M0IFK0G7HFG1IFJ0G1IFP0M0HFGEK0G7HFG9IFK0IFP0L0G1HFGEK0G7HFG9HFGEK0IFP0L0G1HFGEK0G3HFGBHFGCK0G7HFG8O0L0G1TFGCK0G7HFG8O0L0G1TFGCK0G3HFG8O0L0G1TFG8K0G3HFG8O0:::::L0G1TFGCK0G3HFG8O0L0G1HFGEN0G3HFGCK0G3HFG8O0L0G1HFGEN0G3HFGCK0G7HFG8O0L0G1HFGEN0G3HFGEK0G7HFG8O0M0IFN0G3HFGEK0IFP0M0IFG8M0G3IFK0IFP0M0IFGCJ0G1G8G0G3IFJ0G1IFP0M0G7HFGEJ0G3GCG0G3IFG8I0G3HFGEP0M0G7IFJ0GFGEG0G3IFGCI0G7HFGEP0M0G3IFGCH0G3HFG0G3JFI0IFGCP0M0G1JFGCG3IFG8G3JFGCG0G7IFGCP0M0G1OFG8G3PFG8P0N0OFGCG3PFQ0N0G7NFGEG3PFQ0N0G3NFGEG3OFGEQ0N0G1NFGCG3OFGCQ0O0NFG0G3OFG8Q0O0G7LFGEG0G3HFG8LFR0O0G1LFG8G0G3HFG8KFGCR0P0G7JFGCH0G3HFG8G1JFS0Q0IFGEI0G3HFG8G0G7HFGCS0R0HFJ0G3HFG8H0GFU0X0G3HFG8X0::::::::::::::::::,::::::::::::::::::::::::::::::::::::::::^FS^FO60,130^XGR:LOGO.GRF,1,1^FS^CI28^CFC,60^FO340,248^FD^FS^FO550,120^BQ,2,8^FDHM,A4666086^FS^CFC,30^A0N,60,70^FO60,325^FDEasyPost^FS^CFA,30^FO60,390^FD1937 '
          'Davis Street Suite A^FS^FO60,440^FDSan Leandro CA '
          '94577^FS^CFC,30^A0N,60,70^FO60,515^FDJohn Doe^FS^FO60,580^FD2250 '
          'Shattuck Avenue^FS^FO60,635^FDPenthouse^FS^FO60,690^FDBerkeley CA '
          '94704^FS^FXBARCODE^BY3,2,200^FO200,765^BC^FD123^FS^CFA,30^A0N,40,45^FO60,1020^FDREF#:^FS^FO170,1020^FD^FS^FO60,1110^A0N,40,45^FDDATE:^FS^FO170,1110^FD^FS^FO615,1110^A0N,40,45^FD#4666086^FS^XZ'}

I have traced the issue to somewhere inside api_client.py def __deserialize

Related issues/PRs

#1445

Suggest a fix

Don't add extra whitespace.

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