Flake8 e501 как исправить

I execute a linux shell command using python.

I get the below error for the line mentioned-

E501 line too long (99 > 79 characters)

Code:

 ssh_client.exec_command(
            "sudo grep 'cpu ' /proc/stat | awk '{usage=($2+$4)*100/($2+$4+$5)} END {print usage}'")

Im not sure how to format the line as its a Linux command.

asked Sep 7, 2015 at 3:57

The shell command isn’t returning an error. What’s happening is you have a type of source code analysis tool called a linter (specifically in this case, it looks like flake8 to me) that enforces compliance with Python best practices (a la PEP-8). PEP-8 specifies that lines of code should be 79 characters or less. Since that line is longer than 79 characters, the linter complains.

If in a given case you find that conforming to PEP-8 or other established community best practices makes your code less readable, you can mark a line of code # noqa to tell the linter to ignore it:

some_gnarly_line_of_code()  # noqa

minitech’s answer is the right one in this case, but it is helpful to be aware that in special cases you have the latitude to work around linter complaints that break the build!

answered Sep 7, 2015 at 4:15

Consecutive string literals (separated only by whitespace) are merged into one in Python. So:

ssh_client.exec_command(
    "sudo grep 'cpu ' /proc/stat | "
    "awk '{usage=($2+$4)*100/($2+$4+$5)} END {print usage}'")

answered Sep 7, 2015 at 3:58

I execute a linux shell command using python.

I get the below error for the line mentioned-

E501 line too long (99 > 79 characters)

Code:

 ssh_client.exec_command(
            "sudo grep 'cpu ' /proc/stat | awk '{usage=($2+$4)*100/($2+$4+$5)} END {print usage}'")

Im not sure how to format the line as its a Linux command.

asked Sep 7, 2015 at 3:57

The shell command isn’t returning an error. What’s happening is you have a type of source code analysis tool called a linter (specifically in this case, it looks like flake8 to me) that enforces compliance with Python best practices (a la PEP-8). PEP-8 specifies that lines of code should be 79 characters or less. Since that line is longer than 79 characters, the linter complains.

If in a given case you find that conforming to PEP-8 or other established community best practices makes your code less readable, you can mark a line of code # noqa to tell the linter to ignore it:

some_gnarly_line_of_code()  # noqa

minitech’s answer is the right one in this case, but it is helpful to be aware that in special cases you have the latitude to work around linter complaints that break the build!

answered Sep 7, 2015 at 4:15

Consecutive string literals (separated only by whitespace) are merged into one in Python. So:

ssh_client.exec_command(
    "sudo grep 'cpu ' /proc/stat | "
    "awk '{usage=($2+$4)*100/($2+$4+$5)} END {print usage}'")

answered Sep 7, 2015 at 3:58

While trying to input my API key python is giving me a line too long code

E501: line too long

What I have is

notifications_client = NotificationsAPIClient(aaaaaaa_aaaaaaaa-11aa1a1a-aa11-111a-aaaa-11111aaa1a1a-aa11a1a1-0aa1-11a1-1111-1aa111a0a111)

For obvious reasons I have changed the API key to have only a’s 1’s and 0’s but how can I break up this line of code so I no longer get this error?

E501 is a linter error, not a Python interpreter error. Your code, in theory, should work just fine. If you want to prevent this error, simply break the value up (assuming it’s a string … you don’t make that clear):

my_key = ('aaaaaaa_aaaaaaaa-11aa1a1a-aa11-111a-aaaa-'
          '11111aaa1a1a-aa11a1a1-0aa1-11a1-1111-'
          '1aa111a0a111')
notifications_client = NotificationsAPIClient(my_key)

answered Nov 5, 2018 at 16:26

E501 is not a python error, rather than a PEP8 error. Meaning your line is longer than 80 chars (in your case it’s 137 chars long).

Your editor or runtime are verifying that your code is correct by PEP8 rules and that’s why you are getting this «error». Your Python code has actually no errors at all.

If you want your code to be PEP8 compliant I suggest:

1. Extract the API key to a local variable.
2. If it’s still too long you can break up the string into multiple lines

Here is an example:

API_KEY = 'aaaaaaa_aaaaaaaa-11aa1a1a-aa11-111a'  
          '-aaaa-11111aaa1a1a-aa11a1a1-0aa1-' 
          '11a1-1111-1aa111a0a111'
notifications_client = NotificationsAPIClient(API_KEY)

answered Nov 5, 2018 at 16:31

answered Nov 5, 2018 at 16:27

Option which doesn’t involved breaking the string literal:

notifications_client = NotificationsAPIClient(
    "kkkkkkkkkkkkkeeeeeeeeeeeeeeeeeeeeeeeeeeyyyyyyyyyyyyyyyyyyyyy"
)

So long as your key is <73 (minus scope indentation) characters long. If not, you’ll have to split it.

answered Nov 5, 2018 at 16:31

While trying to input my API key python is giving me a line too long code

E501: line too long

What I have is

notifications_client = NotificationsAPIClient(aaaaaaa_aaaaaaaa-11aa1a1a-aa11-111a-aaaa-11111aaa1a1a-aa11a1a1-0aa1-11a1-1111-1aa111a0a111)

For obvious reasons I have changed the API key to have only a’s 1’s and 0’s but how can I break up this line of code so I no longer get this error?

E501 is a linter error, not a Python interpreter error. Your code, in theory, should work just fine. If you want to prevent this error, simply break the value up (assuming it’s a string … you don’t make that clear):

my_key = ('aaaaaaa_aaaaaaaa-11aa1a1a-aa11-111a-aaaa-'
          '11111aaa1a1a-aa11a1a1-0aa1-11a1-1111-'
          '1aa111a0a111')
notifications_client = NotificationsAPIClient(my_key)

answered Nov 5, 2018 at 16:26

E501 is not a python error, rather than a PEP8 error. Meaning your line is longer than 80 chars (in your case it’s 137 chars long).

Your editor or runtime are verifying that your code is correct by PEP8 rules and that’s why you are getting this «error». Your Python code has actually no errors at all.

If you want your code to be PEP8 compliant I suggest:

1. Extract the API key to a local variable.
2. If it’s still too long you can break up the string into multiple lines

Here is an example:

API_KEY = 'aaaaaaa_aaaaaaaa-11aa1a1a-aa11-111a'  
          '-aaaa-11111aaa1a1a-aa11a1a1-0aa1-' 
          '11a1-1111-1aa111a0a111'
notifications_client = NotificationsAPIClient(API_KEY)

answered Nov 5, 2018 at 16:31

answered Nov 5, 2018 at 16:27

Option which doesn’t involved breaking the string literal:

notifications_client = NotificationsAPIClient(
    "kkkkkkkkkkkkkeeeeeeeeeeeeeeeeeeeeeeeeeeyyyyyyyyyyyyyyyyyyyyy"
)

So long as your key is <73 (minus scope indentation) characters long. If not, you’ll have to split it.

answered Nov 5, 2018 at 16:31