pytesseract.pytesseract.TesseractNotFoundError: tesseract is not installed or it's not in your path ...

C:\Users\k\Desktop\test>python test.py
Traceback (most recent call last):
  File "C:\Users\k\Anaconda3\lib\site-packages\pytesseract\pytesseract.py", line 184, in run_tesseract
    proc = subprocess.Popen(cmd_args, **subprocess_args())
  File "C:\Users\k\Anaconda3\lib\subprocess.py", line 947, in __init__
    restore_signals, start_new_session)
  File "C:\Users\k\Anaconda3\lib\subprocess.py", line 1224, in _execute_child
    startupinfo)
FileNotFoundError: [WinError 2]           。

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "test.py", line 5, in 
    text=pytesseract.image_to_string(Image.open('xxx.png'),lang='chi_sim')
  File "C:\Users\k\Anaconda3\lib\site-packages\pytesseract\pytesseract.py", line 309, in image_to_string
    }[output_type]()
  File "C:\Users\k\Anaconda3\lib\site-packages\pytesseract\pytesseract.py", line 308, in 
    Output.STRING: lambda: run_and_get_output(*args),
  File "C:\Users\k\Anaconda3\lib\site-packages\pytesseract\pytesseract.py", line 218, in run_and_get_output
    run_tesseract(**kwargs)
  File "C:\Users\k\Anaconda3\lib\site-packages\pytesseract\pytesseract.py", line 186, in run_tesseract
    raise TesseractNotFoundError()
pytesseract.pytesseract.TesseractNotFoundError: tesseract is not installed or it's not in your path

C:\Users\k\Desktop\test>python test.py
Traceback (most recent call last):
  File "test.py", line 5, in 
    text=pytesseract.image_to_string(Image.open('xxx.png'),lang='chi_sim')
  File "C:\Users\k\Anaconda3\lib\site-packages\pytesseract\pytesseract.py", line 309, in image_to_string
    }[output_type]()
  File "C:\Users\k\Anaconda3\lib\site-packages\pytesseract\pytesseract.py", line 308, in 
    Output.STRING: lambda: run_and_get_output(*args),
  File "C:\Users\k\Anaconda3\lib\site-packages\pytesseract\pytesseract.py", line 218, in run_and_get_output
    run_tesseract(**kwargs)
  File "C:\Users\k\Anaconda3\lib\site-packages\pytesseract\pytesseract.py", line 194, in run_tesseract
    raise TesseractError(status_code, get_errors(error_string))
pytesseract.pytesseract.TesseractError: (1, 'Error opening data file \\Program Files (x86)\\Tesseract-OCR\\tessdata/chi_sim.traineddata Please make sure the TESSDATA_PREFIX environment variable is set to the parent directory of your "tessdata" directory. Failed loading language \'chi_sim\' Tesseract couldn\'t load any languages! Could not initialize tesseract.')