///

An environment variable (also known as "**env var**") is a variable that lives **outside** of the Python code, in the **operating system**, and could be read by your Python code (or by other programs as well).

Environment variables could be useful for handling application **settings**, as part of the **installation** of Python, etc.

## Create and Use Env Vars { #create-and-use-env-vars }

        mean, var = tf.nn.moments(self.kernel, axes=[0, 1, 2], keepdims=True)
        return self.convolution_op(inputs, (self.kernel - mean) / tf.sqrt(var +
        1e-10))` Alternatively, you can override `convolution_op`: `python class
        StandardizedConv2D(tf.keras.Layer): def convolution_op(self, inputs,
        kernel): mean, var = tf.nn.moments(kernel, axes=[0, 1, 2],

```console
$ pip install "fastapi[all]"
---> 100%
```

</div>

### Create the `Settings` object { #create-the-settings-object }

Import `BaseSettings` from Pydantic and create a sub-class, very much like with a Pydantic model.

The same way as with Pydantic models, you declare class attributes with type annotations, and possibly default values.

		return
	}

	idpCfgType := mux.Vars(r)["type"]
	cfgName := mux.Vars(r)["name"]
	password := cred.SecretKey

	if !madmin.ValidIDPConfigTypes.Contains(idpCfgType) {
		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrAdminConfigInvalidIDPType), r.URL)
		return
	}

	cfg := globalServerConfig.Clone()
	var cfgInfos []madmin.IDPCfgInfo
	var err error
	switch idpCfgType {

			} else {
				builder.AddVar(builder, expr.Vars[idx])
			}

			idx++
		} else {
			if v == '(' {
				afterParenthesis = true
			} else {
				afterParenthesis = false
			}
			builder.WriteByte(v)
		}
	}

	if idx < len(expr.Vars) {
		for _, v := range expr.Vars[idx:] {
			builder.AddVar(builder, sql.NamedArg{Value: v})
		}
	}
}

// NamedExpr raw expression for named expr

				} else {
					vars[idx] = nullStr
				}
			}
		case []byte:
			if s := string(v); isPrintable(s) {
				vars[idx] = escaper + strings.ReplaceAll(s, escaper, escaper+escaper) + escaper
			} else {
				vars[idx] = escaper + "<binary>" + escaper
			}
		case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64:
			vars[idx] = utils.ToString(v)
		case float32:

	}

	if !reflect.DeepEqual([]interface{}{"jinzhu", "POINT(100 100)"}, stmt.Vars) {
		t.Errorf("generated vars is not equal, got %v", stmt.Vars)
	}

	stmt = dryRunDB.Model(UserWithPoint{}).Create(map[string]interface{}{
		"Name":  "jinzhu",
		"Point": clause.Expr{SQL: "ST_PointFromText(?)", Vars: []interface{}{"POINT(100 100)"}},
	}).Statement

	if objAPI == nil {
		return
	}
	vars := mux.Vars(r)
	scName := vars["tier"]

	password := cred.SecretKey
	reqBytes, err := madmin.DecryptData(password, io.LimitReader(r.Body, r.ContentLength))
	if err != nil {
		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErrWithErr(ErrAdminConfigBadJSON, err), r.URL)
		return
	}

	var creds madmin.TierCreds

	ctx := r.Context()

	objectAPI, _ := validateAdminReq(ctx, w, r, policy.AttachPolicyAdminAction)
	if objectAPI == nil {
		return
	}

	vars := mux.Vars(r)
	policyName := vars["policyName"]
	entityName := vars["userOrGroup"]
	isGroup := vars["isGroup"] == "true"
	setReqInfoPolicyName(ctx, policyName)

	if !isGroup {
		ok, _, err := globalIAMSys.IsTempUser(entityName)

	if objAPI == nil {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
		return
	}

	vars := mux.Vars(r)
	bucket := vars["bucket"]

	var withUpdatedAt bool
	if updatedAtStr := r.Form.Get("withUpdatedAt"); updatedAtStr != "" {
		var err error
		withUpdatedAt, err = strconv.ParseBool(updatedAtStr)
		if err != nil {