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Tools: make Python import error more readable

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The problem with printing the exception was that starting with
Python 3.6 the ImportError is yet another (sub) exception called
ModuleNotFoundError which can't be printed as a string and then triggers
another exception:

```
Traceback (most recent call last):
  File "/home/julianoes/src/Firmware/Tools/serial/generate_config.py", line 11, in <module>
    import jinja2
ModuleNotFoundError: No module named 'jinja2'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/julianoes/src/Firmware/Tools/serial/generate_config.py", line 13, in <module>
    print("Failed to import jinja2: " + e)
TypeError: must be str, not ModuleNotFoundError
```

As per @bkueng's suggestion the easiest is to cast the exception to str
and that way prevent the second exception.
This commit is contained in:
Julian Oes
2020-02-13 15:37:09 +01:00
committed by Beat Küng
parent 7cafbc824e
commit 9a96ca14be
8 changed files with 38 additions and 38 deletions
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4
Tools/mavlink_shell.py
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@@ -16,7 +16,7 @@ from argparse import ArgumentParser
try:
from pymavlink import mavutil
except ImportError as e:
print("Failed to import pymavlink: " + e)
print("Failed to import pymavlink: " + str(e))
print("")
print("You may need to install it with:")
print(" pip3 install --user pymavlink")
@@ -26,7 +26,7 @@ except ImportError as e:
try:
import serial
except ImportError as e:
print("Failed to import pyserial: " + e)
print("Failed to import pyserial: " + str(e))
print("")
print("You may need to install it with:")
print(" pip3 install --user pyserial")