Recent questions tagged Python

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python - How to apply pos_tag_sents() to pandas dataframe efficiently

In situations where you wish to POS tag a column of text stored in a pandas dataframe with 1 sentence per ... ? Link to Sample Dataset 20kRows See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How do I do conditional array arithmetic on a numpy array?

I'm trying to get a better grip on numpy arrays, so I have a sample question to ask about them: Say I ... most compact syntax for this? Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - reshape a pandas dataframe

suppose a dataframe like this one: df = pd.DataFrame([[1,2,3,4],[5,6,7,8],[9,10,11,12]], columns = ... there must be a better way. Any ideas ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Get keys from template

I would like to get a list of all possible keyword arguments a string template might use in a substitution. Is ... $$5 should render to "$5". See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Removing trailing empty elements in a list

Is there an elegant pythonic way of removing trailing empty elements from a list? A sort of list.rstrip( ... single line (readable) expression See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - What does the $ mean when running commands?

I've been learning Python, and I keep running into the $ character in online documentation. Usually it goes something ... 't work. Any help? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - csv.writerows() puts newline after each row

This is an example from the O'Reilly Cookbook (truncated dataset) headers = ['Symbol','Price','Date','Time ... the file into OpenOffice Calc. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Sum along axis in numpy array

I want to understand how this ndarray.sum(axis=) works. I know that axis=0 is for columns and axis=1 is for ... of 3 or more axes(dimensions). See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Make Pandas groupby act similarly to itertools groupby

Suppose I have a Python dict of lists like so: {'Grp': ['2' , '6' , '6' , '5' , '5' , '6' , ... .array to split the sub groups of each key out. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Create function through MySQLdb

How can I define a multi-statement function or procedure in using the MySQLdb lib in python? Example: import ... client, it works as expected See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to groupby time series by 10 minutes using pandas

Have a time series(ts) indexed by DatatimeIndex, want to group it by 10 minutes index x y z ts1 ... ... cannot concatenate a non-NDFrame object See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python 3.x - Suppressing treatment of string as iterable

UPDATE: An idea to make built-in strings non-iterable was proposed on python.org in 2006. My question differs ... is iterable but not a string See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Getting every slice of a list

I've been through itertools inside and out and I cannot figure out how to do the following. I want to take a ... 't do exactly what I'm hoping See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to I factorize a list of tuples?

definition factorize: Map each unique object into a unique integer. Typically, the range of integers mapped to is ... logx=True, logy=True) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How can I standardize only numeric variables in an sklearn pipeline?

I am trying to create an sklearn pipeline with 2 steps: Standardize the data Fit the data using KNN ... standardizing only the numeric columns? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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171 views

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python - Pandas data frame to dictionary of lists

How to use Python or Pandas (preferably) to convert a Pandas DataFrame to dictionary of lists for input into highcharts? The ... 2, 3, 4, 5]} See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Send multiple tab key presses with Selenium

How can I send multiple tabs with Selenium? When I run: uname = browser.find_element_by_name("text") uname. ... TAB manually multiple times? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Tkinter error: Couldn't recognize data in image file

I'm trying to put a jpg image to a tkinter canvas. tkinter gives me this error: couldn't recognize data in ... image are in the same folder. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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463 views

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python - How to convert the integer date format into YYYYMMDD?

Python and Matlab quite often have integer date representations as follows: 733828.0 733829.0 733832.0 733833.0 ... format? thanks a million! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How/why does set() in {frozenset()} work?

Even though sets are unhashable, membership check in other set works: >>> set() in {frozenset()} True ... membership in other set implemented? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Passing memoryview to C function

I have a C function declared as follows: void getIndexOfState(long *p, long C, long G, long B, long * ... array before calling the C function? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Process finished with exit code -1073741819 (0xC0000005) Pycharm

I'm completly stuck on this. I keep getting error message Process finished with exit code -1073741819 (0xC0000005) ... . Can anyone help please? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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121 views

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python - combine two arrays and sort

Given two sorted arrays like the following: a = array([1,2,4,5,6,8,9]) b = array([3,4,7,10] ... of elements. Any idea is welcomed. Thanks See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python pandas dataframe thread safe?

I am using multiple threads to access and delete data in my pandas dataframe. Because of this, I am wondering is pandas dataframe threadsafe? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Break for loop in an if statement

Currently having trouble with breaking this for loop. I want to break it if the variable is not found in this list so ... (z) k +=1 break else: See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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734 views

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python - AttributeError: 'Tensor' object has no attribute '_keras_history'

I looked for all the "'Tensor' object has no attribute ***" but none seems related to Keras (except for ... Thank you for any help provided ! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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393 views

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python - pytz.astimezone not accounting for daylight savings?

On 2013 Jun 1 I expect the "PST8PDT" timezone to behave like GMT+7, as it is daylight savings in that ... I doing wrong? Thanks in advance! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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429 views

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python - inequality comparison of numpy array with nan to a scalar

I am trying to set members of an array that are below a threshold to nan. This is part of a QA/QC ... can't introduce new dependencies. Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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