CODEWITHSUNDEEP
pythonstringfloating-pointint
Laurent Mesguen
Laurent Mesguen

Reputation: 394

TypeError: Must be str not int

I am using this code to concatenate strings with a float value :

fr = channel.freqhz / 1000000
print ("fr type is", type(fr))
rx_channel = "<RxChannel>\n\
  <IsDefault>1</IsDefault>\n\
  <UsedForRX2>" + channel.usedforrx2 + "</UsedForRX2>\n\
  <ChIndex>" + str(i) + "</ChIndex>\n\
  <LC>" + str(channel.index) + "</LC>\n\
  <SB>" + channel.subband + "</SB>\n\
  <DTC>100</DTC>\n\
  <Frequency>" + str(fr) + "</Frequency>\n\
  <MinDR>0</MinDR>\n\
  <MaxDR>5</MaxDR>\n\
</RxChannel>\n"

But I get this error message :

> fr type is <class 'float'>                                         
> Traceback (most recent call last):                                    
> File "createRFRegion.py", line 260, in <module>                       
> write_rf_region(rf_region_file, rf_region_filename)                   
> File "createRFRegion.py", line 233, in write_rf_region                
> rf_region_file.write(create_rx_channel(channel, i))                   
> File "createRFRegion.py", line 164, in create_rx_channel              
> <Frequency>" + str(fr) + "</Frequency>\n\                             
> TypeError: must be str, not int

I don't understand this error because I am using the str() function to convert the float to str.

Upvotes: 2

Views: 6794

Answers (2)

Błotosmętek
Błotosmętek

Reputation: 12927

What are values of channel.usedforrx2 and channel.subband? I suspect one of them is int rather than string. Also, to make your code more readable, consider replacing that statement with:

rx_channel = """<RxChannel>
  <IsDefault>1</IsDefault>
  <UsedForRX2>{}</UsedForRX2>
  <ChIndex>{}</ChIndex>
  <LC>{}</LC>
  <SB>{}</SB>
  <DTC>100</DTC>
  <Frequency>{}</Frequency>
  <MinDR>0</MinDR>
  <MaxDR>5</MaxDR>
</RxChannel>
""".format(channel.usedforrx2, i, channel.index, channel.subband, fr)

Upvotes: 2

BlueMoon93
BlueMoon93

Reputation: 2976

Just use str() in all fields.

Python doesn't deal well with multi-line operations and errors, and will point at the last line of the multi-line operation (I'm assuming it is joining together all the strings in the last line, and thus pointing at str(fr)).

The field fr isn't even an int, it's a float, so the error is coming from one of the other fields. My guess is channel.subband, a sub-band of a channel will be an integer.

rx_channel = "<RxChannel>\n<IsDefault>1</IsDefault>\n<UsedForRX2>" + 
    str(channel.usedforrx2) + "</UsedForRX2>\n<ChIndex>" + 
    str(i) + "</ChIndex>\n<LC>" + 
    str(channel.index) + "</LC>\n<SB>" + 
    str(channel.subband) + "</SB>\n<DTC>100</DTC>\n<Frequency>" + 
    str(fr) + "</Frequency>\n<MinDR>0</MinDR>\n<MaxDR>5</MaxDR>\n/RxChannel>\n"

Upvotes: 4

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