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Multiple Inheritance in PHP

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round() for float in C++

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Stripping everything but alphanumeric chars from a string in Python

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Python: What OS am I running on?

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PHP Session Security

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Chrome, Javascript, window.open in new tab

...popup, OR open in a new tab, if the user configured the browser to do so. EDIT: A more detailed explanation: 1. In modern browsers, window.open will open in a new tab rather than a popup. 2. You can force a browser to use a new window (‘popup’) by specifying options in the 3rd parameter 3. ...
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What's the difference between utf8_general_ci and utf8_unicode_ci?

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What is the easiest way to parse an INI file in Java?

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Can I specify multiple users for myself in .gitconfig?

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Progress indicator during pandas operations

...Other supported functions include map, applymap, aggregate, and transform. EDIT To directly answer the original question, replace: df_users.groupby(['userID', 'requestDate']).apply(feature_rollup) with: from tqdm import tqdm tqdm.pandas() df_users.groupby(['userID', 'requestDate']).progress_apply(...