attempting to replace open() with a pandas subset, but I am given an __exit__ error?
I am trying to work with pylabels to create nametags for an upcoming event. In one section of the code, there is this tid-bit:
with open(os.path.join(base_path, "names.txt")) as names:
sheet.add_labels(name.strip() for name in names)
where sheet = labels.Sheet(specs, write_name, border=True). So essentially, this will load each line of "names.txt" and call the function 'write_name', using specifications in 'specs', and add each name to unique labels. I'm attempting to change this code to the following:
with text_file[["Name"]] as names:
sheet.add_labels(name.strip() for name in names)
But I get this error:
Traceback (most recent call last):
File "sticker.V.7.py", line 173, in <module>
with text_file[["Name"]] as names:
AttributeError: __exit__
Can anyone help me understand what exit means in this context? I do not understand from other submissions.
I am hoping to add this subsetting aspect so that I can add further details to the nametags.
I am using Python3.5
python python-3.x pandas contextmanager
edited Nov 16 '18 at 9:20
cricket_007
82.5k1143111
asked Nov 15 '18 at 4:01
agenttinyagenttiny
184
add a comment |
I am trying to work with pylabels to create nametags for an upcoming event. In one section of the code, there is this tid-bit:
with open(os.path.join(base_path, "names.txt")) as names:
sheet.add_labels(name.strip() for name in names)
where sheet = labels.Sheet(specs, write_name, border=True). So essentially, this will load each line of "names.txt" and call the function 'write_name', using specifications in 'specs', and add each name to unique labels. I'm attempting to change this code to the following:
with text_file[["Name"]] as names:
sheet.add_labels(name.strip() for name in names)
But I get this error:
Traceback (most recent call last):
File "sticker.V.7.py", line 173, in <module>
with text_file[["Name"]] as names:
AttributeError: __exit__
Can anyone help me understand what exit means in this context? I do not understand from other submissions.
I am hoping to add this subsetting aspect so that I can add further details to the nametags.
I am using Python3.5
python python-3.x pandas contextmanager
edited Nov 16 '18 at 9:20
cricket_007
82.5k1143111
asked Nov 15 '18 at 4:01
agenttinyagenttiny
184
What istext_fileand why[["Name"]], obviously it is not something exitable and thus cannot be used withwith.
– MatrixTai
Nov 15 '18 at 4:05
text_file is a dataframe made through pd.read_csv. [['Name']] is a column of the text_file dataframe. as text_file isn't a function, it should be exitable
– agenttiny
Nov 15 '18 at 4:34
add a comment |
I am trying to work with pylabels to create nametags for an upcoming event. In one section of the code, there is this tid-bit:
with open(os.path.join(base_path, "names.txt")) as names:
sheet.add_labels(name.strip() for name in names)
where sheet = labels.Sheet(specs, write_name, border=True). So essentially, this will load each line of "names.txt" and call the function 'write_name', using specifications in 'specs', and add each name to unique labels. I'm attempting to change this code to the following:
with text_file[["Name"]] as names:
sheet.add_labels(name.strip() for name in names)
But I get this error:
Traceback (most recent call last):
File "sticker.V.7.py", line 173, in <module>
with text_file[["Name"]] as names:
AttributeError: __exit__
Can anyone help me understand what exit means in this context? I do not understand from other submissions.
I am hoping to add this subsetting aspect so that I can add further details to the nametags.
I am using Python3.5
python python-3.x pandas contextmanager
edited Nov 16 '18 at 9:20
cricket_007
82.5k1143111
asked Nov 15 '18 at 4:01
agenttinyagenttiny
184
I am trying to work with pylabels to create nametags for an upcoming event. In one section of the code, there is this tid-bit:
with open(os.path.join(base_path, "names.txt")) as names:
sheet.add_labels(name.strip() for name in names)
where sheet = labels.Sheet(specs, write_name, border=True). So essentially, this will load each line of "names.txt" and call the function 'write_name', using specifications in 'specs', and add each name to unique labels. I'm attempting to change this code to the following:
with text_file[["Name"]] as names:
sheet.add_labels(name.strip() for name in names)
But I get this error:
Traceback (most recent call last):
File "sticker.V.7.py", line 173, in <module>
with text_file[["Name"]] as names:
AttributeError: __exit__
Can anyone help me understand what exit means in this context? I do not understand from other submissions.
I am hoping to add this subsetting aspect so that I can add further details to the nametags.
I am using Python3.5
python python-3.x pandas contextmanager
python python-3.x pandas contextmanager
edited Nov 16 '18 at 9:20
cricket_007
82.5k1143111
asked Nov 15 '18 at 4:01
agenttinyagenttiny
184
edited Nov 16 '18 at 9:20
cricket_007
82.5k1143111
asked Nov 15 '18 at 4:01
agenttinyagenttiny
184
edited Nov 16 '18 at 9:20
cricket_007
82.5k1143111
edited Nov 16 '18 at 9:20
cricket_007
82.5k1143111
edited Nov 16 '18 at 9:20
cricket_007
82.5k1143111
82.5k1143111
asked Nov 15 '18 at 4:01
agenttinyagenttiny
184
asked Nov 15 '18 at 4:01
agenttinyagenttiny
184
asked Nov 15 '18 at 4:01
agenttinyagenttiny
184
184
What istext_fileand why[["Name"]], obviously it is not something exitable and thus cannot be used withwith.
– MatrixTai
Nov 15 '18 at 4:05
text_file is a dataframe made through pd.read_csv. [['Name']] is a column of the text_file dataframe. as text_file isn't a function, it should be exitable
– agenttiny
Nov 15 '18 at 4:34
add a comment |
What istext_fileand why[["Name"]], obviously it is not something exitable and thus cannot be used withwith.
– MatrixTai
Nov 15 '18 at 4:05
text_file is a dataframe made through pd.read_csv. [['Name']] is a column of the text_file dataframe. as text_file isn't a function, it should be exitable
– agenttiny
Nov 15 '18 at 4:34
What is
text_file and why [["Name"]], obviously it is not something exitable and thus cannot be used with with.– MatrixTai
Nov 15 '18 at 4:05
What is
text_file and why [["Name"]], obviously it is not something exitable and thus cannot be used with with.– MatrixTai
Nov 15 '18 at 4:05
text_file is a dataframe made through pd.read_csv. [['Name']] is a column of the text_file dataframe. as text_file isn't a function, it should be exitable
– agenttiny
Nov 15 '18 at 4:34
text_file is a dataframe made through pd.read_csv. [['Name']] is a column of the text_file dataframe. as text_file isn't a function, it should be exitable
– agenttiny
Nov 15 '18 at 4:34
add a comment |
1 Answer
1
active
oldest
votes
Can anyone help me understand what
__exit__means in this context? I do not understand from other submissions. ... Astext_fileisn't a function, it should be exitable.
When you use with statement context managers, that object must define these two methods:
__enter____exit__
Whatever text_file[["Name"]] is (a Pandas DataFrame, it seems), it doesn't implement either of these methods. As indicated by the traceback, it doesn't define __enter__ at all, so execution stops right there and raises an exception.
I don't see a need to use a DataFrame as a context manager. A typical use-case is when you want to ensure that something happens at the end of the with block, namely, closing a file stream. (Like a try/finally block--you want to make sure __exit__ gets called unconditionally.) With a Pandas DataFrame, I'm not sure if there is any analogy that would necessitate have those two dunder methods.
answered Nov 15 '18 at 4:32
Brad SolomonBrad Solomon
13.7k83486
Thanks for the advice! ill try another method that includes an exit call.
– agenttiny
Nov 15 '18 at 8:05
add a comment |
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1 Answer
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1 Answer
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active
oldest
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oldest
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Can anyone help me understand what
__exit__means in this context? I do not understand from other submissions. ... Astext_fileisn't a function, it should be exitable.
When you use with statement context managers, that object must define these two methods:
__enter____exit__
Whatever text_file[["Name"]] is (a Pandas DataFrame, it seems), it doesn't implement either of these methods. As indicated by the traceback, it doesn't define __enter__ at all, so execution stops right there and raises an exception.
I don't see a need to use a DataFrame as a context manager. A typical use-case is when you want to ensure that something happens at the end of the with block, namely, closing a file stream. (Like a try/finally block--you want to make sure __exit__ gets called unconditionally.) With a Pandas DataFrame, I'm not sure if there is any analogy that would necessitate have those two dunder methods.
answered Nov 15 '18 at 4:32
Brad SolomonBrad Solomon
13.7k83486
Thanks for the advice! ill try another method that includes an exit call.
– agenttiny
Nov 15 '18 at 8:05
add a comment |
Can anyone help me understand what
__exit__means in this context? I do not understand from other submissions. ... Astext_fileisn't a function, it should be exitable.
When you use with statement context managers, that object must define these two methods:
__enter____exit__
Whatever text_file[["Name"]] is (a Pandas DataFrame, it seems), it doesn't implement either of these methods. As indicated by the traceback, it doesn't define __enter__ at all, so execution stops right there and raises an exception.
I don't see a need to use a DataFrame as a context manager. A typical use-case is when you want to ensure that something happens at the end of the with block, namely, closing a file stream. (Like a try/finally block--you want to make sure __exit__ gets called unconditionally.) With a Pandas DataFrame, I'm not sure if there is any analogy that would necessitate have those two dunder methods.
answered Nov 15 '18 at 4:32
Brad SolomonBrad Solomon
13.7k83486
Thanks for the advice! ill try another method that includes an exit call.
– agenttiny
Nov 15 '18 at 8:05
add a comment |
Can anyone help me understand what
__exit__means in this context? I do not understand from other submissions. ... Astext_fileisn't a function, it should be exitable.
When you use with statement context managers, that object must define these two methods:
__enter____exit__
Whatever text_file[["Name"]] is (a Pandas DataFrame, it seems), it doesn't implement either of these methods. As indicated by the traceback, it doesn't define __enter__ at all, so execution stops right there and raises an exception.
I don't see a need to use a DataFrame as a context manager. A typical use-case is when you want to ensure that something happens at the end of the with block, namely, closing a file stream. (Like a try/finally block--you want to make sure __exit__ gets called unconditionally.) With a Pandas DataFrame, I'm not sure if there is any analogy that would necessitate have those two dunder methods.
answered Nov 15 '18 at 4:32
Brad SolomonBrad Solomon
13.7k83486
Can anyone help me understand what
__exit__means in this context? I do not understand from other submissions. ... Astext_fileisn't a function, it should be exitable.
When you use with statement context managers, that object must define these two methods:
__enter____exit__
Whatever text_file[["Name"]] is (a Pandas DataFrame, it seems), it doesn't implement either of these methods. As indicated by the traceback, it doesn't define __enter__ at all, so execution stops right there and raises an exception.
I don't see a need to use a DataFrame as a context manager. A typical use-case is when you want to ensure that something happens at the end of the with block, namely, closing a file stream. (Like a try/finally block--you want to make sure __exit__ gets called unconditionally.) With a Pandas DataFrame, I'm not sure if there is any analogy that would necessitate have those two dunder methods.
answered Nov 15 '18 at 4:32
Brad SolomonBrad Solomon
13.7k83486
answered Nov 15 '18 at 4:32
Brad SolomonBrad Solomon
13.7k83486
answered Nov 15 '18 at 4:32
Brad SolomonBrad Solomon
13.7k83486
answered Nov 15 '18 at 4:32
Brad SolomonBrad Solomon
13.7k83486
13.7k83486
Thanks for the advice! ill try another method that includes an exit call.
– agenttiny
Nov 15 '18 at 8:05
add a comment |
Thanks for the advice! ill try another method that includes an exit call.
– agenttiny
Nov 15 '18 at 8:05
Thanks for the advice! ill try another method that includes an exit call.
– agenttiny
Nov 15 '18 at 8:05
Thanks for the advice! ill try another method that includes an exit call.
– agenttiny
Nov 15 '18 at 8:05
add a comment |
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What is
text_fileand why[["Name"]], obviously it is not something exitable and thus cannot be used withwith.– MatrixTai
Nov 15 '18 at 4:05
text_file is a dataframe made through pd.read_csv. [['Name']] is a column of the text_file dataframe. as text_file isn't a function, it should be exitable
– agenttiny
Nov 15 '18 at 4:34