If you look at the docs for bytes, it points you to bytearray: bytearray([source[, encoding[, errors]]]) Return a new array of bytes. The bytearray type is a mutable sequence of integers in the range 0 <= x < 256. It has most of the usual methods of mutable sequences, described in Mutable Sequence Types, as well as … Read more
What is meant is a string like AB0C5342F. In C terms:
You can use this: Or, for versions earlier than JDK 1.5, use java.util.StringBuffer instead of StringBuilder — they have the same API. Thanks commentators for pointing out that StringBuilder is preferred nowadays when there is no concurrency concern.
It is strongly advised to use a context manager. As an advantage, it is made sure the file is always closed, no matter what: This is the explicit version (but always remember, the context manager version from above should be preferred): If you’re using Python2.6 or higher, it’s preferred to use str.format() For python2.7 and higher … Read more
No, there’s no direct not operator. At least not the way you hope for. You can use a zero-width negative lookahead, however: The (?!…) part means “only match if the text following (hence: lookahead) this doesn’t (hence: negative) match this. But it doesn’t actually consume the characters it matches (hence: zero-width). There are actually 4 combinations of lookarounds with 2 axes: lookbehind / lookahead : … Read more
How do I make the first letter of a string uppercase, but not change the case of any of the other letters? For example: “this is a test” → “This is a test” “the Eiffel Tower” → “The Eiffel Tower” “/index.html” → “/index.html”
Obviously some of your lines don’t have valid float data, specifically some line have text id which can’t be converted to float. When you try it in interactive prompt you are trying only first line, so best way is to print the line where you are getting this error and you will know the wrong … Read more
There are two functions that give an object’s string representation, repr() and str(). The former is designed to convert the object to as-code string, while the latter gives user-friendly string. When you input the variable name in the command line, repr() is used, and \n character is shown as \n (as-code). When you use print, … Read more
You can use this: Or, for versions earlier than JDK 1.5, use java.util.StringBuffer instead of StringBuilder — they have the same API. Thanks commentators for pointing out that StringBuilder is preferred nowadays when there is no concurrency concern.
How do I make the first letter of a string uppercase, but not change the case of any of the other letters? For example: “this is a test” → “This is a test” “the Eiffel Tower” → “The Eiffel Tower” “/index.html” → “/index.html”