python-2.7

问题 I have a dataframe, I want to change only those values of a column where another column fulfills a certain condition. I'm trying to do this with iloc at the moment and it either does not work or I'm getting that annoying warning: A value is trying to be set on a copy of a slice from a DataFrame Example: import pandas as pd DF = pd.DataFrame({'A':[1,1,2,1,2,2,1,2,1],'B':['a','a','b','c','x','t','i','x','b']}) Doing one of those DF['B'].iloc[:][DF['A'] == 1] = 'X' DF.iloc[:]['B'][DF['A'] == 1]

问题 I have a dataframe, I want to change only those values of a column where another column fulfills a certain condition. I'm trying to do this with iloc at the moment and it either does not work or I'm getting that annoying warning: A value is trying to be set on a copy of a slice from a DataFrame Example: import pandas as pd DF = pd.DataFrame({'A':[1,1,2,1,2,2,1,2,1],'B':['a','a','b','c','x','t','i','x','b']}) Doing one of those DF['B'].iloc[:][DF['A'] == 1] = 'X' DF.iloc[:]['B'][DF['A'] == 1]

问题 I have a table and I want to change background color of tr if value of person.storyPublished is true otherwise do nothing. My code looks like this: {% for person in people %} <tr class="row-person {% '.row-story-published' if person.storyPublished else ' ' %}" > <td> {{ person.name }} </td> ... I get this error: jinja2.exceptions.TemplateSyntaxError TemplateSyntaxError: tag name expected and the CSS part is here: <style> .row-story-published{ background-color: #b3ffb3; } </style> why is this

问题 I have a table and I want to change background color of tr if value of person.storyPublished is true otherwise do nothing. My code looks like this: {% for person in people %} <tr class="row-person {% '.row-story-published' if person.storyPublished else ' ' %}" > <td> {{ person.name }} </td> ... I get this error: jinja2.exceptions.TemplateSyntaxError TemplateSyntaxError: tag name expected and the CSS part is here: <style> .row-story-published{ background-color: #b3ffb3; } </style> why is this

问题 I have a table and I want to change background color of tr if value of person.storyPublished is true otherwise do nothing. My code looks like this: {% for person in people %} <tr class="row-person {% '.row-story-published' if person.storyPublished else ' ' %}" > <td> {{ person.name }} </td> ... I get this error: jinja2.exceptions.TemplateSyntaxError TemplateSyntaxError: tag name expected and the CSS part is here: <style> .row-story-published{ background-color: #b3ffb3; } </style> why is this

问题 I have a table and I want to change background color of tr if value of person.storyPublished is true otherwise do nothing. My code looks like this: {% for person in people %} <tr class="row-person {% '.row-story-published' if person.storyPublished else ' ' %}" > <td> {{ person.name }} </td> ... I get this error: jinja2.exceptions.TemplateSyntaxError TemplateSyntaxError: tag name expected and the CSS part is here: <style> .row-story-published{ background-color: #b3ffb3; } </style> why is this

问题 I have a table and I want to change background color of tr if value of person.storyPublished is true otherwise do nothing. My code looks like this: {% for person in people %} <tr class="row-person {% '.row-story-published' if person.storyPublished else ' ' %}" > <td> {{ person.name }} </td> ... I get this error: jinja2.exceptions.TemplateSyntaxError TemplateSyntaxError: tag name expected and the CSS part is here: <style> .row-story-published{ background-color: #b3ffb3; } </style> why is this

问题 I would like to change the upper case string characters in a variable to lower case and replace the spaces with "_". I know I can use an 'if' statement for all instances but this would take too long. It is to save the input of a user to a filename i.e. user_selection = 'Barracuda Limited' # what I have save_name == 'barracuda_limited' # what I want Note: I have read through the page on how to post and am trying my best, but I have just started to learn coding and am having trouble trying to

问题 I would like to change the upper case string characters in a variable to lower case and replace the spaces with "_". I know I can use an 'if' statement for all instances but this would take too long. It is to save the input of a user to a filename i.e. user_selection = 'Barracuda Limited' # what I have save_name == 'barracuda_limited' # what I want Note: I have read through the page on how to post and am trying my best, but I have just started to learn coding and am having trouble trying to

问题 I am using Python 2.7 and Tkinter to make a GUI for my code. At one point, a frame is filled with many buttons in a loop. When I click on one of the buttons, the function needs to know from where it was called, so I googled and found out this nice way to do it: def generate_buttons(n): for i in xrange(n): newbutton = str(i) newbutton = Button(myFrame, text=newbutton, command= lambda name=i:print_name(name)).grid(column=i) and: def print_name(name): print name So when I generate my buttons