Recent questions tagged Python

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python format datetime with "st", "nd", "rd", "th" (english ordinal suffix) like PHP's "S"

I would like a python datetime object to output (and use the result in django) like this: Thu the 2nd at 4 ... or python function will be fine. 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 - ImportError: No module named copy_reg pickle

I'm trying to unpickle an object stored as a blob in a MySQL database. I've manually generated and stored ... try this: cPickle.loads(rawString) 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 calculate a packet checksum without sending it?

I'm using scapy, and I want to create a packet and calculate its' checksum without sending it. Is there a way to do it? 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: merged (inner join) data frame has more rows than the original ones

I am using python 3.4 on Jupyter Notebook, trying to merge two data frame like below: df_A.shape (204479, 2) ... . Any idea what I missed here? 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 compute jaccard similarity from a pandas dataframe

I have a dataframe as follows: the shape of the frame is (1510, 1399). The columns represents products, the rows represents ... )) : ......... 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 count null values in a groupby function

df = pd.DataFrame({'A' : ['foo', 'bar', 'foo', 'bar', 'foo', 'bar', 'foo', 'foo'], 'B' : [' ... ('sum') But this is not working... Thank You 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 - SQLAlchemy Joining with subquery issue

I am trying to translate SQL into SQLAlchemy. The SQL version of the query I want is as follows: SELECT * ... help would be appreciated, 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 - How to use window functions in PySpark?

I'm trying to use some windows functions (ntile and percentRank) for a data frame but I don't know how to use them. ... I'm using spark 1.4.0. 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 - 'NoneType' object is not subscriptable?

list1 = ["name1", "info1", 10] list2 = ["name2", "info2", 30] list3 = ["name3", "info3", 50] ... run printer(MASTERLIST) What did I do wrong? 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 type negative number with .isdigit?

when I try this if question.isdigit() is True: I can type in numbers fine, and this would filter out alpha/ ... ("Please type in the number") See Question&Answers more detail:os...

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

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509 views

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python - Getting number of messages in a RabbitMQ queue

We're using amqplib to publish/consume messages. I want to be able to read the number of messages on a ... point me in the right direction? See Question&Answers more detail:os...

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

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148 views

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python - Read only mode in keras

I have cloned human pose estimation keras model from this link human pose estimation keras When I try to load the ... do I load this model? 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 - multiprocessing with large data

I am using multiprocessing.Pool() to parallelize some heavy computations. The target function returns a lot of data (a ... This is Python 2.7. See Question&Answers more detail:os...

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

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190 views

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python - Matplotlib set_color_cycle versus set_prop_cycle

One of my favorite things to do in Matplotlib is to set the color-cycle to match some colormap, in order to produce ... y, lw=3) plt.show() 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 writer not closing file

im reading a csv file and then writing a new one: import csv with open('thefile.csv', 'rb') as f: data = ... .csv after i am done with it? See Question&Answers more detail:os...

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

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192 views

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python - Read json file as pandas dataframe?

I am using python 3.6 and trying to download json file (350 MB) as pandas dataframe using the code ... data_df = pd.read_json(data_json_str) See Question&Answers more detail:os...

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

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225 views

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python - Replace all occurrences that match regular expression

I have a regular expression that searches for a string that contains '.00.' or '.11.' as follows: .*.( ... string replace for this task? 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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755 views

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python - savefig loop adds previous plots to figure

I am trying to use a forloop to produce figures for each set of data I have, but while the .show() ... plot also plotted the previous result. See Question&Answers more detail:os...

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

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343 views

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python - Most efficient method to check if dictionary key exists and process its value if it does

MyDict = {'key1':'value1', 'key2':'value2'} I can do this few ways: if 'key1' in MyDict: var1 = ... most efficient in terms of computing speed? See Question&Answers more detail:os...

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

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131 views

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python - Multiprocessing a function with several inputs

In Python the multiprocessing module can be used to run a function over a range of values in parallel. For example, ... f(i, 20)) return ans See Question&Answers more detail:os...

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

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110 views

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python - Assign function arguments to `self`

I've noticed that a common pattern I use is to assign SomeClass.__init__() arguments to self attributes of ... way to perform this assignment? See Question&Answers more detail:os...

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

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445 views

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python - NumPy "record array" or "structured array" or "recarray"

What, if any, is the difference between a NumPy "structured array", a "record array" and a "recarray ... simple explanation of this difference? See Question&Answers more detail:os...

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

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792 views

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python - Seaborn / Matplotlib: How to repress scientific notation in factorplot y-axis

Simple example below for this issue which I just can't solve. N.B. Some other Seaborn plotting methods seems ... based on the coverage values? See Question&Answers more detail:os...

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

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377 views

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python - Flatten numpy array

Is there a simple way in NumPy to flatten type object array? I know .flatten() method flattens non-object type ... 3]], dtype=object) 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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457 views

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python - ElementTree findall() returning empty list

I am trying to write a small script for interacting with the last.fm API. I have a small bit of experience working ... </date> </track> <track> See Question&Answers more detail:os...

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

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310 views

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python - tkinter listbox get(ACTIVE) method

I was trying to make the currently selected Listbox item to be printed out. For example, when I select item "one ... way the get(ACTIVE) works? See Question&Answers more detail:os...

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

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519 views

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python - TypeError: 'NoneType' object has no attribute '__getitem__'

I'm having an issue and I have no idea why this is happening and how to fix it. I'm working on developing a ... is happening so I can fix it? See Question&Answers more detail:os...

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

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294 views

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python - Trim specific leading and trailing characters from a string

I have a string that contains a path str = "/example/path/with/different/trailing/delimiter" and I want to ... to set the delimiters manually? See Question&Answers more detail:os...

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

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