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AttributeError: 'datetime' module has no attribute 'strptime'

... the strptime method. Or, you could change the import statement to this: from datetime import datetime and access it as you are. The people who made the datetime module also named their class datetime: #module class method datetime.datetime.strptime(date, "%Y-%m-%d") ...
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Java - removing first character of a string

... Use the substring() function with an argument of 1 to get the substring from position 1 (after the first character) to the end of the string (leaving the second argument out defaults to the full length of the string). "Jamaica".substring(1); ...
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How to parse JSON in Python?

...Sometimes your json is not a string. For example if you are getting a json from a url like this: j = urllib2.urlopen('http://site.com/data.json') you will need to use json.load, not json.loads: j_obj = json.load(j) (it is easy to forget: the 's' is for 'string') ...
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Angular HttpPromise: difference between `success`/`error` methods and `then`'s arguments

...e 2 is that .then() call returns a promise (resolved with a value returned from a callback) while .success() is more traditional way of registering callbacks and doesn't return a promise. Promise-based callbacks (.then()) make it easy to chain promises (do a call, interpret results and then do anot...
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What does the @ symbol represent in objective-c?

...jects more efficient. (They become part of the method signature available from the runtime, which DO can look at to determine how to best serialize a transaction.) There are also the attributes within @property declarations, copy, retain, assign, readonly, readwrite, nonatomic, getter, and setter;...
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Fade/dissolve when changing UIImageView's image

... Edit: there is a better solution from @algal below. Another way to do this is by using predefined CAAnimation transitions: CATransition *transition = [CATransition animation]; transition.duration = 0.25; transition.timingFunction = [CAMediaTimingFunction f...
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The apk must be signed with the same certificates as the previous version

...e. How do I check which signing keys were used? Gather the information from the APK You can check which certificates the original APK and update APK were signed with by using these commands, using the Java keytool: keytool -list -printcert -jarfile original.apk keytool -list -printcert -jarfil...
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Java: Detect duplicates in ArrayList?

...of detecting the elements in a 2D array be the same? For example, checking from array[0][0] to array[0][6] (a 'row')..? Many thanks, Terry – Terry Feb 18 '09 at 21:29 ...
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window.location.reload with clear cache [duplicate]

...r cache too, so on page refresh the page has latest versions of everything from server. Other browsers except IE are not getting latest content. ...
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How to use git bisect?

...ially since I've managed to find a good commit and I'm on that branch now. From this position this explanation is no help at all. How do I specify the bad branch without checking it out, for example – PandaWood Dec 2 '13 at 1:19 ...