python-3.x

问题 -- I'm loading test data into my SQL Server Database using python and was able to successfully take images and break them down into bytes and store them in the database, but when trying to fetch back the bytes and decode it to save it as a new file type, all i get is a blank image file. Not sure what i am doing wrong here... -- I've tried several iterations using base64 from other tutorials and similar questions, but cant seem to find one that will solve my problem. SQLCommand = ("SELECT

问题 I have matrix like this (first column names rest are values, separator i tab): name1 A1 B1 C1 D1 name2 A2 B2 C2 D2 Matrix could be huge (it is mean about hundreds rows and columns). It is allays same size. I can expect zero values. I need output like this: name1 A1 B1 C1 D1 A1/B1 A1/C1 A1/D1 name2 A2 B2 C2 D2 A2/B2 A2/C2 A2/D2 This combination save to new file. And then make another combination: name1 A1 B1 C1 D1 B1/A1 B1/C1 B1/D1 name2 A2 B2 C2 D2 B2/A2 B2/C2 B2/D2 and so on so on => divide

问题 I have a list of list L as : [ [1,2,3,4,5,6], [10,20,30,40,50,60], [11,12,113,4,15,6], ] Inner list are of same size. I want to choose n-random elements from every row of L and output it as same list of list. I tried the following code: import random import math len_f=len(L) index=[i for i in range(len_f)] RANDOM_INDEX=random.sample(index, 5)) I am stuck at this point that how can I use random index to get output from L. The output for "2" random elements would be: [ [1,6], [10,60], [11,6], ]

问题 I have matrix like this (first column names rest are values, separator i tab): name1 A1 B1 C1 D1 name2 A2 B2 C2 D2 Matrix could be huge (it is mean about hundreds rows and columns). It is allays same size. I can expect zero values. I need output like this: name1 A1 B1 C1 D1 A1/B1 A1/C1 A1/D1 name2 A2 B2 C2 D2 A2/B2 A2/C2 A2/D2 This combination save to new file. And then make another combination: name1 A1 B1 C1 D1 B1/A1 B1/C1 B1/D1 name2 A2 B2 C2 D2 B2/A2 B2/C2 B2/D2 and so on so on => divide

问题 There is a class that contains the following information The name of the student, his group, grades in geometry, algebra and computer science def __init__(self,surn,numbgroup,markgeometry,markalgebra,markinformatika): self.surn=surn self.numbgroup=numbgroup self.markgeometry=markgeometry self.markalgebra=markalgebra self.markinformatika=markinformatika There are class objects, they are stored in the list - studinfos [] (Surname, Group, grades in 3 subjects ()) Smith ARP11 3,3,3 Brown ARP12 4

问题 I have a list of list L as : [ [1,2,3,4,5,6], [10,20,30,40,50,60], [11,12,113,4,15,6], ] Inner list are of same size. I want to choose n-random elements from every row of L and output it as same list of list. I tried the following code: import random import math len_f=len(L) index=[i for i in range(len_f)] RANDOM_INDEX=random.sample(index, 5)) I am stuck at this point that how can I use random index to get output from L. The output for "2" random elements would be: [ [1,6], [10,60], [11,6], ]

问题 Closed. This question needs debugging details. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed last month . Improve this question Can not install geopandas with in python 3.7. Always this error pops up: Problem Problem in anaconda Please help! 回答1: First, based on Geopandas documentations, they recommend to use conda package manager. Secondly, Geopandas relies on other packages and their installations is

问题 If we want to alter the output of yaml.dump we can use tranform keyword argument. Documentation: https://yaml.readthedocs.io/en/latest/example.html Here is the yaml data: metadata: name: name alias: alias it is stored in variable x. x = 'metadata:\n name: name\n alias: alias\n' def tr(s): return s.replace('\n', '\n ') # Want 4 space at each new line from ruamel.yaml import YAML from ruamel.yaml.compat import StringIO yaml = YAML(typ="safe") yaml.default_flow_style = False stream = StringIO()

问题 There is a class that contains the following information The name of the student, his group, grades in geometry, algebra and computer science def __init__(self,surn,numbgroup,markgeometry,markalgebra,markinformatika): self.surn=surn self.numbgroup=numbgroup self.markgeometry=markgeometry self.markalgebra=markalgebra self.markinformatika=markinformatika There are class objects, they are stored in the list - studinfos [] (Surname, Group, grades in 3 subjects ()) Smith ARP11 3,3,3 Brown ARP12 4

问题 I have a model that has one binary variable x [i] [j] [k]. I need to add a constraint that fullfils this condition: if x[i][j][k1]==1 and x[j][i][k2]==1 Then: k2-k1>8 I have this code but I assum it is not correct : mdl.add((y[(i,j,k)]+y[(j,i,k1)]==2),(k1-k>8) ) I also, put this: mdl.add(mdl.if_then(y[(i,j,k1)]+y[(j,i,k2)]==2, k2-k1>8)) but I got this error: raise DOcplexException(resolved_message) DOcplexException: Expecting linear constraint, got: False How can I model this with cplex