I'm kinda new to the whole aspect of programming and might have f***d up my installations/paths and dont know how to properly fix things. I hope you can help me. I want to start using pycharm which expects python 3.8 from /usr/local/bin/python3.8 as Interpreter but my .bash - console tells me my python version is 3.7.6 and when i do julian$ which python  in my console (on macOS Catalina 10.15.6 btw) the output shows /opt/anaconda3/bin/python  How do I change the path my console chooses to the above mentioned /usr/local/bin/python3.8  such that I can install packages there manually?
Questions about    setting environment variables the PATH   are very common here, and in most cases the answers are very similar to each other. In the future it would be nice to have a good Q/A for this.  So the question is: What are environment variables, like the executable PATH, and how can I change and use them on major operating systems?  A good answer would include a simple explanation of what environment variables and especially PATH mean to the OS, as well as simple guidelines on how to set and read them accordingly.
Earlier i was not specifying a custom log format, and the captured request headers were getting printed fine. I wanted to log the unique-id-header, but could not find any way of doing so. So i copy pasted the log-format mentioned on , and unique id started getting logged.  Unfortunately, now the captured request headers are not getting logged. The %hrl and %hsl are coming out as empty strings.  Very weird. Here is my config, plzz help :(  listen server   bind *:80   mode http    option  httplog   option  http-server-close   no option logasap   # disable early logging of HTTP requests so that total transfer time is logged   option  forwardfor   capture request  header    X-Forwarded-For      len 500    capture request  header    Host                 len 500    capture request  header    X-Request-UID        len 500    rspadd  X-Haproxy-Backend:\ server    # Generate the X-Haproxy-Unique-ID and log it to make it easy to track requests   log-format %Ci:%Cp\ [id=%ID]\ [%t]\ %f\ %b/%s\ %Tq/%Tw/%Tc/%Tr/%Tt\ %st\ %B\ %cc\ %cs\ %tsc\ %ac/%fc/%bc/%sc/%rc\ %sq/%bq\ {%hrl}\ {%hsl}\ %{+Q}r   unique-id-format %{+X}o\ %Ci:%Cp_%Fi:%Fp_%Ts_%rt:%pid   unique-id-header X-Haproxy-Unique-ID   Here is the log i see:  Sep 13 17:28:57 localhost haproxy[11979]: 10.161.27.218:41592  [id=0AA11BDA:A278_0AA15B71:0050_505217C5_0014:2ECB] [13/Sep/2012:17:28:37.567]  server www-example-com-healthz/- 19998/0/2/1/+20001 200 +326  - - ---- 10/10/1/1/0 0/0 {} {}  "GET /testing/healthz?merchant=www.example.com&amp;source=elb HTTP/1.1"   Note that %hrl and %hsl are empty strings :( How do i capture the request headers ?? Why is the well ordering principle counter-intuitive? I read  that while 'The Axiom of Choice agrees with the intuition of most mathematicians; the Well Ordering Principle is contrary to the intuition of most mathematicians'. I don't understand why this is so. According to Wikipedia, 'the well-ordering principle states that every non-empty set of positive integers contains a least element'. This is quite a straightforward definition. Is it the way you derive the equivalence of the Axiom of Choice and well ordering principle that makes it counter-intuitive or the definition of the least element? What should I do if a user posts sensitive information as part of a question or answer? I've observed several incidents where users inadvertently posted detailed, sensitive information. For example, a Server Fault user who posted a question with working login credentials to his actual production server, or the Stack Overflow user who posted actual medical records as example data for his question.   What should be the procedure for handling such cases? I have a question about XTP_CHECKPOINT.  I'm using SQL Server 2014. I have a database that is in SIMPLE recovery model mode. It is also being replicated.  There are no open transactions. I've run DBCC OPENTRAN and it returns:     "No active open transactions."   But I keep getting this message whenever I try to create or drop a table or delete data: (I've replaced my actual database name with the word database_name)     "The transaction log for database 'database_name' is full due to 'XTP_CHECKPOINT'"     Does anyone know why this might be happening, and, more importantly, how can I make it stop?  And yes, the database really is in SIMPLE recovery model mode. i.e. The transaction log should truncate automatically.  Incidentally, another database that I have in full recovery mode did the same thing, started returning the same error:     The transaction log for database 'database_name' is full due to 'XTP_CHECKPOINT'   I tried to change the log growth settings to unlimited growth, but it wouldn't let me, returning the same error.  I can reproduce the problem without any XTP stuff at all, except for just the filegroup. Here's how: When a land becomes creature, can you kill it? Why are values in Entites obtained directly and sometimes by using getters? For example  Drupal\Core\Entity\Entity::id() returns $this-&gt;id(or NULL) Drupal\Core\Entity\ContentEntityBase::id() returns $this-&gt;id-&gt;value Drupal\Core\Entity\ContentEntityBase::uuid() returns $this-&gt;get('uuid')-&gt;value Drupal\node\Entity\Node::id() returns $this-&gt;get('nid')-&gt;value  Also in some methods there are setValue() and getValue() utilised but sometimes there are just $this-&gt;field-&gt;value. So what is the reason for this inconsistent behavior? From my understanding all the &quot;fields&quot; are TypedData fields hence the setValue() and getValue() methods should be used instead of directly access $this-&gt;field-&gt;value. Besides it's strange because $value is private. Can the "Sacrifice (this card):" activated ability be placed back on the stack? This is a broad question so for simplicity I will use  and .  Scenario 1: Common exchange- creating a baseline.   Player A uses Naturalize on Seal of Fire  Player B Sacrifices SoF in response. SoF is highest on the stack and goes off first.  This leaves Naturalize without a valid target.   Scenario 2: Complicated exchange- Is this legal?   Player B Sacrifices SoF. In response Player A targets it with Naturalize. SoF is on the stack and it's ability has not resolved. Player B (as above) sacrifices SoF in response to the Naturalize.    Can Seal of Fire be placed back on the stack by re-activating its ability, potentially with a new target? Lie algebra of $\left(\begin{smallmatrix}a & b\\ & a^2\end{smallmatrix}\right )$ in $GL_2(\mathbb{R})$ I'm working on the question     Let $G$ be the group of invertible real matrices of the form $\left [\begin{array}{c c}a &amp; b\\ &amp; a^2\end{array}\right ]$. Determine the Lie algebra $L$ of $G$, and compute the bracket on $L$.   I'm familiar with how to derive the Lie algebra for a linear group like $U_n$, $SU_n$, etc. but I'm not sure what to do in a more explicit case like this. Let $V,W$ be two vector spaces over a field $F$ and let $f:V \to W$ be a linear mapping. I have going over some facts about vector spaces (not necessarily finite dimensional) and I have been trying to apply the rank nullity theorem to derive a simple lemma.  I have not been able to complete the proof and was wondering if I need to use something other then $\ker f + \mathrm{Im}\; f = \dim V$.  How do we show that for ever vector subspace $K \subset W$, $ \dim(f^{-1}(K)) = \dim(K \cap \mathrm{Im}\; f) + \dim( \mathrm{Ker}\; f)$? Why does this excerpt say that unbiased estimation of standard deviation usually isn't relevant? Create a virtual file that is actually a command Label rows of a matrix by characters How to add label to index the rows and columns of the matrix ? because I want to number the line outside the matrix       \[     \begin{array}{lc}       \ Mat_{\varPhi to M} &amp; \left(\begin{array}{@{}ccccc@{}}             1 &amp; 1 &amp; 1 &amp; 1 &amp; 1 \\             0 &amp; 1 &amp; 0 &amp; 0 &amp; 1 \\             0 &amp; 0 &amp; 1 &amp; 0 &amp; 1 \\             0 &amp; 0 &amp; 0 &amp; 1 &amp; 1 \\             0 &amp; 0 &amp; 0 &amp; 0 &amp; 1               \end{array}\right) \\[15pt]     \end{array}     \] How to delay or slowly loop commands? I found 11 questions like this on gamingSE already, but none of them have proper and up-to-date answers. So I'm creating this Q&amp;A:  How do you either activate a command x seconds/minutes/hours/… in the future or every x seconds/minutes/… in a loop?  Repeating command blocks and ticking functions execute 20 times per second, redstone is  in many situations and most of the extremely fancy solutions, like falling blocks in cobwebs, have broken over time or are needlessly complicated. Canonical vs. non-canonical terminal input Different results for integration using Mathematica and MATLAB Not sure this is something which people will know on here are not.    We currently have a BI setup where we have Integration services on one SQL instance and the data warehouse database on a separate SQL Instance.    My question is, as no users physically connect to the Integration services SQL instance and it is purely used to execute package from the integrations service catalog via SQL agent, do we need to License every user i.e. Cal's for that SQL instance.  Basically i'm wanting to know if I could utilize SQL 2016 for an integration services instance and use features like Json manipulation etc and then load this data into the 2014 version instance...but what level of licensing will I need? Delayed eraser experiment (Kim experiment) Will I receive an interference pattern on D0 detector   if D1, D2, D3, D4 exist in the set up of the experiment, but they are thousands of light years far? Simply, to set up the experiment so that I detect all of the signal photons on D0 before I detect any of idler photons! Why does a cork float to the side of a glass? Why does a cork ball float to the side of a glass as illustrated in the following GIF? What is the physical phenomenon behind this observation and why does it happen? When an account is deleted, don't auto delete its negatively scored posts on the meta site Meta is different. Negatively scored questions are not always bad questions, and sometimes they have merit and draw good answers, especially discussions.  When an account (in the main site) is deleted, either by self deletion or by a moderator, all questions with score of -1 or less are being deleted regardless of their answers, both in the main and meta site.  Can you please change this behavior so that the questions on the per-site meta will survive and won't be auto-deleted? I just bought a controller because I am tired of not to being able to do any tricks with keyboard controls. The problem is I am can't configure controls as FIFA 13 PC version  doesn't consider a controller in their settings.  Does anyone know how to do this?