pyinstaller 'no module named tesserocr'

[xtt5480446]

I encountered with this question when i wanted to run the executable file which gained by using pyinstaller to package my application which imported tesserocr. Has anyone encountered with this problem?

njudeMacBook-Air:~ nju$ /Users/nju/Documents/openCV/dist/pyInstallerTest ; exit;
Traceback (most recent call last):
 File "pyInstallerTest.py", line 2, in <module>
ImportError: No module named tesserocr
Failed to execute script pyInstallerTest
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